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Paint
I'm building a 9 foot wooden flat bottom boat for myself and the kids. It'
made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? |
Paint
On Sun, 11 Apr 2010 13:16:01 -0500, "Dave"
wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? If you used a waterproof plywood, either marine grade or exterior grade you can use about any paint that doesn't wash off. Two of my Uncles built a car top fishing boat out of waterproof fir plywood. Painted it with some sort of enamel paint. Used it every weekend during fishing season. Between fishing trips it was stored in the garage. The older Uncle died some 15 years later and the boat was still serviceable. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
Dave wrote:
I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc |
Paint
"Paul Oman" wrote in message m... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc I was also fiberglassing the seams today on the boat. Is it possible to use the Resin without the fiberglass for/as a paint? |
Paint
On Mon, 12 Apr 2010 07:13:06 -0500, "Dave"
wrote: "Paul Oman" wrote in message om... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc I was also fiberglassing the seams today on the boat. Is it possible to use the Resin without the fiberglass for/as a paint? Sure. In fact many people that build stitch and glue do exactly that. Tape the seams and use the rest of the pot to paint the plywood. However... epoxy has very little UV resistance so cover it with something else. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
Sure. In fact many people that build stitch and glue do exactly that. Tape the seams and use the rest of the pot to paint the plywood. However... epoxy has very little UV resistance so cover it with something else. Cheers, Bruce Thanks, Next question: Using Exterior Latex, what would be a good bonding agent for the Resin? Latex Primer? |
Paint
On Mon, 12 Apr 2010 16:59:11 -0500, "Dave"
wrote: Sure. In fact many people that build stitch and glue do exactly that. Tape the seams and use the rest of the pot to paint the plywood. However... epoxy has very little UV resistance so cover it with something else. Cheers, Bruce Thanks, Next question: Using Exterior Latex, what would be a good bonding agent for the Resin? Latex Primer? For a stitch and glue boat you should be using epoxy as for sticking things together it is so much stronger. Most of the epoxy sold for boat building develop a surface coating of a somewhat oily substance refereed to as "blush" which has to be removed before additional coats of anything are applied. This can be done by sanding it by washing, if washing you can use soap and water or my fiberglass mate's recipe of vinegar and water. Now we have eliminated the blush we have to deal with the slick, shiny surface that epoxy hardens to. Usually by sanding with about 220 grit paper. So... what you have ended up with is a 220 grit finish on a material that is pretty much impervious to your paint, i.e., the paint can't soak in. Probably much like painting that hard cement board (I believe it is refereed to as "dry wall") used to finish off the inside of houses. Frankly, I don't know a thing about house paint but I suspect that any primer that you can use over "cement board" and a paint that doesn't wash off will work. If the paint does fall off it just paint it with something else :-) Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
"Bruce" wrote in message ... On Mon, 12 Apr 2010 16:59:11 -0500, "Dave" wrote: Sure. In fact many people that build stitch and glue do exactly that. Tape the seams and use the rest of the pot to paint the plywood. However... epoxy has very little UV resistance so cover it with something else. Cheers, Bruce Thanks, Next question: Using Exterior Latex, what would be a good bonding agent for the Resin? Latex Primer? For a stitch and glue boat you should be using epoxy as for sticking things together it is so much stronger. Most of the epoxy sold for boat building develop a surface coating of a somewhat oily substance refereed to as "blush" which has to be removed before additional coats of anything are applied. This can be done by sanding it by washing, if washing you can use soap and water or my fiberglass mate's recipe of vinegar and water. Now we have eliminated the blush we have to deal with the slick, shiny surface that epoxy hardens to. Usually by sanding with about 220 grit paper. So... what you have ended up with is a 220 grit finish on a material that is pretty much impervious to your paint, i.e., the paint can't soak in. Probably much like painting that hard cement board (I believe it is refereed to as "dry wall") used to finish off the inside of houses. Frankly, I don't know a thing about house paint but I suspect that any primer that you can use over "cement board" and a paint that doesn't wash off will work. If the paint does fall off it just paint it with something else :-) Cheers, Bruce (bruceinbangkokatgmaildotcom) Thanks for the assistance.. |
Paint
On Wed, 14 Apr 2010 11:20:14 -0400, I am Tosk
wrote: In article , says... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc With all due respect, that is not the way to go. I am going to assume he used regular exterior ply and it is more vulnerable to moisture damage than BS1088 or similar. If he coats it with two coats of thinned epoxy, moisture that gets in (and it will) can not get out. Wooden boats are best done old school with paint and sealer. A good wood primer, some sandpaper, and a couple coats of acrylic based paint, he doesn't want to use latex, at least on the outside, inside is ok... Let the wood breathe and the boat will last a lot longer... Scotty, just my opinion. I think it depends on many things. did any scrapes or dings damage the boat? Dragged it up on the beach and wore all the coating off the bottom? But your assertion that somehow moisture penetrates in through the epoxy and can't get out just isn't logical - there is no one way valves in the epoxy :-) My own experience seems quite different from yours. For example, I built an 8 ft. dinghy using exterior grade plywood some ten years ago.. Tapped the joints and covered the outside of the bottom with IIRC 400 gm cloth. The rest of the boat was painted with epoxy, epoxy primer, two part polyurethane. Some eight years after I built it a bloke walked by the dinghy, bottom side up in the dock in front of my sailboat, and started to admire it. finally said, "would I sell it?". I did immediately, and I saw the boat, now 10 years + old, still being used just the other day. Of course, my boat is/was used in salt water which is somewhat of a preservative, or perhaps preventative, as far as dry rot goes, but still, a ten year + life for a 8 ft. two sheet of plywood, dinghy does seem satisfactory, or at least value for money. Of course, just painting works also. I believe I have mentioned a fishing boat they two Uncles built from exterior grade fir plywood. Kept in the garage and used a day or two every week during fishing season that was still usable after 15 years. .. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
On 4/14/2010 8:58 PM, Bruce wrote:
On Wed, 14 Apr 2010 11:20:14 -0400, I am Tosk wrote: In articleGYidnffzHaIC51_WnZ2dnUVZ_rmdnZ2d@earthlink .com, says... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc With all due respect, that is not the way to go. I am going to assume he used regular exterior ply and it is more vulnerable to moisture damage than BS1088 or similar. If he coats it with two coats of thinned epoxy, moisture that gets in (and it will) can not get out. Wooden boats are best done old school with paint and sealer. A good wood primer, some sandpaper, and a couple coats of acrylic based paint, he doesn't want to use latex, at least on the outside, inside is ok... Let the wood breathe and the boat will last a lot longer... Scotty, just my opinion. I think it depends on many things. did any scrapes or dings damage the boat? Dragged it up on the beach and wore all the coating off the bottom? But your assertion that somehow moisture penetrates in through the epoxy and can't get out just isn't logical - there is no one way valves in the epoxy :-) My own experience seems quite different from yours. For example, I built an 8 ft. dinghy using exterior grade plywood some ten years ago.. Tapped the joints and covered the outside of the bottom with IIRC 400 gm cloth. The rest of the boat was painted with epoxy, epoxy primer, two part polyurethane. Some eight years after I built it a bloke walked by the dinghy, bottom side up in the dock in front of my sailboat, and started to admire it. finally said, "would I sell it?". I did immediately, and I saw the boat, now 10 years + old, still being used just the other day. Of course, my boat is/was used in salt water which is somewhat of a preservative, or perhaps preventative, as far as dry rot goes, but still, a ten year + life for a 8 ft. two sheet of plywood, dinghy does seem satisfactory, or at least value for money. Of course, just painting works also. I believe I have mentioned a fishing boat they two Uncles built from exterior grade fir plywood. Kept in the garage and used a day or two every week during fishing season that was still usable after 15 years. . Cheers, Bruce (bruceinbangkokatgmaildotcom) You just pushed me over the trip point, Bruce. I' going to build a simple D5 dinghy. -- Richard Lamb http://www.home.earthlink.net/~cavelamb/ |
Paint
In article ,
says... On Wed, 14 Apr 2010 11:20:14 -0400, I am Tosk wrote: In article , says... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc With all due respect, that is not the way to go. I am going to assume he used regular exterior ply and it is more vulnerable to moisture damage than BS1088 or similar. If he coats it with two coats of thinned epoxy, moisture that gets in (and it will) can not get out. Wooden boats are best done old school with paint and sealer. A good wood primer, some sandpaper, and a couple coats of acrylic based paint, he doesn't want to use latex, at least on the outside, inside is ok... Let the wood breathe and the boat will last a lot longer... Scotty, just my opinion. I think it depends on many things. did any scrapes or dings damage the boat? Dragged it up on the beach and wore all the coating off the bottom? But your assertion that somehow moisture penetrates in through the epoxy and can't get out just isn't logical - there is no one way valves in the epoxy :-) Yes, but my assertion is based on the idea that water will get in, no matter how you handle things, eventually. Once it wicks into small cracks and distributes itself within the encapsulation, it has a hard time finding it's way out again, as it doesn't have GPS either;) You may have had a great experience, of course you are a superior boat builder with a golden hammer too;), but most encapsulation jobs are not 100%, and like I said, once water gets in, it has a hard time finding it's way out and can cause a lot of problems. I still say, let the wood breath in and out, it's gonna' breath in anyway, so why not... Scotty -- Save the Ta'ta's!... http://tinyurl.com/ygqxs5v |
Paint
Thanks for the Tips guys. The boat has normal household plywood and 2x2 for
frame. It'll be for occaisional use. non-marine or non-treated. Actually the wife has never been on a boat and has a fear of something, this is a good way to educate her or face her fears. She's watching it get built. IF she likes this one and overcomes her fears, then we'll get a "real" boat next year. |
Paint
In article ,
says... Thanks for the Tips guys. The boat has normal household plywood and 2x2 for frame. It'll be for occaisional use. non-marine or non-treated. Actually the wife has never been on a boat and has a fear of something, this is a good way to educate her or face her fears. She's watching it get built. IF she likes this one and overcomes her fears, then we'll get a "real" boat next year. All the more reason to use paint and primer as opposed to expensive resin. Some here will howl but I never spend more than 20 bucks to paint a plywood skiff. I go to Home Depot and look for some nice beige or tan for the inside, something flat that won't reflect or collect heat, and something nice and shiny green or similar for the outside. I start at the "goof" table where there is usually a nice selection of colors for practically no $$. I am not going to spend a hundred bucks a year to paint a boat that cost me 100 to build. I painted my house green on green several years back, guess what color my next skiff was? ;) If the boat is made of better wood I will use better stuff, I have probably used more Petit than any other for higher end stuff. "Marine" paints are easier to use, look nicer when cured, etc, but just not for a boat made of exterior ply. Again, just my opinion. Scotty -- Save the Ta'ta's!... http://tinyurl.com/ygqxs5v |
Paint
"I am Tosk" wrote in message ... In article , says... Thanks for the Tips guys. The boat has normal household plywood and 2x2 for frame. It'll be for occaisional use. non-marine or non-treated. Actually the wife has never been on a boat and has a fear of something, this is a good way to educate her or face her fears. She's watching it get built. IF she likes this one and overcomes her fears, then we'll get a "real" boat next year. All the more reason to use paint and primer as opposed to expensive resin. Some here will howl but I never spend more than 20 bucks to paint a plywood skiff. I go to Home Depot and look for some nice beige or tan for the inside, something flat that won't reflect or collect heat, and something nice and shiny green or similar for the outside. I start at the "goof" table where there is usually a nice selection of colors for practically no $$. I am not going to spend a hundred bucks a year to paint a boat that cost me 100 to build. I painted my house green on green several years back, guess what color my next skiff was? ;) If the boat is made of better wood I will use better stuff, I have probably used more Petit than any other for higher end stuff. "Marine" paints are easier to use, look nicer when cured, etc, but just not for a boat made of exterior ply. Again, just my opinion. Scotty -- Save the Ta'ta's!... http://tinyurl.com/ygqxs5v Oh, I agree. cheaper the better! LOL! I don't expect the home made boat to last 2 seasons anyways. so far I have about $200 in supplies in it so far. |
Paint
On Thu, 15 Apr 2010 04:04:12 -0400, I am Tosk
wrote: In article , says... On Wed, 14 Apr 2010 11:20:14 -0400, I am Tosk wrote: In article , says... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc With all due respect, that is not the way to go. I am going to assume he used regular exterior ply and it is more vulnerable to moisture damage than BS1088 or similar. If he coats it with two coats of thinned epoxy, moisture that gets in (and it will) can not get out. Wooden boats are best done old school with paint and sealer. A good wood primer, some sandpaper, and a couple coats of acrylic based paint, he doesn't want to use latex, at least on the outside, inside is ok... Let the wood breathe and the boat will last a lot longer... Scotty, just my opinion. I think it depends on many things. did any scrapes or dings damage the boat? Dragged it up on the beach and wore all the coating off the bottom? But your assertion that somehow moisture penetrates in through the epoxy and can't get out just isn't logical - there is no one way valves in the epoxy :-) Yes, but my assertion is based on the idea that water will get in, no matter how you handle things, eventually. Once it wicks into small cracks and distributes itself within the encapsulation, it has a hard time finding it's way out again, as it doesn't have GPS either;) You may have had a great experience, of course you are a superior boat builder with a golden hammer too;), but most encapsulation jobs are not 100%, and like I said, once water gets in, it has a hard time finding it's way out and can cause a lot of problems. I still say, let the wood breath in and out, it's gonna' breath in anyway, so why not... Scotty You may be right but there have been thousands of plywood boats built that were sheathed, to the best of my knowledge all of the strip planked boats, of any size, are sheathed, a tremendous number of boats use plywood cores in decks. All of these are coated with epoxy. Epoxy is recommended by every paint company for sealing fiberglass hulls after doing an osmoses treatment and grinding off the gelcoat. This is not to say that water never, never, never, will get in but I suggest that the boats that are epoxy coated last better and are stronger then uncoated boats. Whether, or not I am a "superior boat builder with a golden hammer" is probably debatable but the recommendations I have given are all ones that I have successfully used. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
On Thu, 15 Apr 2010 02:35:19 -0500, cavelamb ""cavelamb\"@ X
earthlink.net" wrote: On 4/14/2010 8:58 PM, Bruce wrote: On Wed, 14 Apr 2010 11:20:14 -0400, I am Tosk wrote: In articleGYidnffzHaIC51_WnZ2dnUVZ_rmdnZ2d@earthlink .com, says... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc With all due respect, that is not the way to go. I am going to assume he used regular exterior ply and it is more vulnerable to moisture damage than BS1088 or similar. If he coats it with two coats of thinned epoxy, moisture that gets in (and it will) can not get out. Wooden boats are best done old school with paint and sealer. A good wood primer, some sandpaper, and a couple coats of acrylic based paint, he doesn't want to use latex, at least on the outside, inside is ok... Let the wood breathe and the boat will last a lot longer... Scotty, just my opinion. I think it depends on many things. did any scrapes or dings damage the boat? Dragged it up on the beach and wore all the coating off the bottom? But your assertion that somehow moisture penetrates in through the epoxy and can't get out just isn't logical - there is no one way valves in the epoxy :-) My own experience seems quite different from yours. For example, I built an 8 ft. dinghy using exterior grade plywood some ten years ago.. Tapped the joints and covered the outside of the bottom with IIRC 400 gm cloth. The rest of the boat was painted with epoxy, epoxy primer, two part polyurethane. Some eight years after I built it a bloke walked by the dinghy, bottom side up in the dock in front of my sailboat, and started to admire it. finally said, "would I sell it?". I did immediately, and I saw the boat, now 10 years + old, still being used just the other day. Of course, my boat is/was used in salt water which is somewhat of a preservative, or perhaps preventative, as far as dry rot goes, but still, a ten year + life for a 8 ft. two sheet of plywood, dinghy does seem satisfactory, or at least value for money. Of course, just painting works also. I believe I have mentioned a fishing boat they two Uncles built from exterior grade fir plywood. Kept in the garage and used a day or two every week during fishing season that was still usable after 15 years. . Cheers, Bruce (bruceinbangkokatgmaildotcom) You just pushed me over the trip point, Bruce. I' going to build a simple D5 dinghy. The one I told the story about building 10 years ago was a D-4. I built it hell for strong and it ended up much heavier then I would have liked, but it was a good boat. I could haul me, mother and three or four 20 liter jugs of water out to the boat with no problems. I built my D-4 with the mast step and center board but I wouldn't bother doing it again. I think I sailed the thing, maybe twice. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
On Thu, 15 Apr 2010 15:32:34 -0400, I am Tosk
wrote: In article , says... Thanks for the Tips guys. The boat has normal household plywood and 2x2 for frame. It'll be for occaisional use. non-marine or non-treated. Actually the wife has never been on a boat and has a fear of something, this is a good way to educate her or face her fears. She's watching it get built. IF she likes this one and overcomes her fears, then we'll get a "real" boat next year. All the more reason to use paint and primer as opposed to expensive resin. Some here will howl but I never spend more than 20 bucks to paint a plywood skiff. I go to Home Depot and look for some nice beige or tan for the inside, something flat that won't reflect or collect heat, and something nice and shiny green or similar for the outside. I start at the "goof" table where there is usually a nice selection of colors for practically no $$. I am not going to spend a hundred bucks a year to paint a boat that cost me 100 to build. I painted my house green on green several years back, guess what color my next skiff was? ;) If the boat is made of better wood I will use better stuff, I have probably used more Petit than any other for higher end stuff. "Marine" paints are easier to use, look nicer when cured, etc, but just not for a boat made of exterior ply. Again, just my opinion. Scotty Different strokes for different folks :-) I use two part polyurethane paint because the paint will last the life of the dinghy. Barn paint gets sort of scruffy after a year or so. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
On Thu, 15 Apr 2010 07:32:48 -0500, "Dave"
wrote: Thanks for the Tips guys. The boat has normal household plywood and 2x2 for frame. It'll be for occaisional use. non-marine or non-treated. Actually the wife has never been on a boat and has a fear of something, this is a good way to educate her or face her fears. She's watching it get built. IF she likes this one and overcomes her fears, then we'll get a "real" boat next year. If you built it from interior grade plywood it is not going to last a long time however you certainly should get some use out of the boat, and if this is the first boat that you have built you will probably begin to find fault with it after a while and start to think about "the next boat". It can become an obsession - to build the perfect boat :-) Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
"the next boat". It can become an obsession - to build the perfect
boat :-) Cheers, Bruce OH NO! Not that! LOL! I expect to get a couple of seasons out of this homebuilt. nothing more... The wife already named thins little dingy craft "NsaniT" |
Paint
On Thu, 15 Apr 2010 20:17:12 -0500, "Dave"
wrote: "the next boat". It can become an obsession - to build the perfect boat :-) Cheers, Bruce OH NO! Not that! LOL! I expect to get a couple of seasons out of this homebuilt. nothing more... The wife already named thins little dingy craft "NsaniT" Yes, probably get a good few years out of it, but it sure is hard to row and seems to be a bit low in the water with the Missus aboard and it might be nice to have a sail, and we could take the kids if it were just a little bigger, and hey! an outboard would be nice for longer trips, and if it had a top we wouldn't get rained on and damn, that barn paint is scruffy, sure needs a paint job..... :-) Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
In article ,
says... On Thu, 15 Apr 2010 04:04:12 -0400, I am Tosk wrote: In article , says... On Wed, 14 Apr 2010 11:20:14 -0400, I am Tosk wrote: In article , says... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc With all due respect, that is not the way to go. I am going to assume he used regular exterior ply and it is more vulnerable to moisture damage than BS1088 or similar. If he coats it with two coats of thinned epoxy, moisture that gets in (and it will) can not get out. Wooden boats are best done old school with paint and sealer. A good wood primer, some sandpaper, and a couple coats of acrylic based paint, he doesn't want to use latex, at least on the outside, inside is ok... Let the wood breathe and the boat will last a lot longer... Scotty, just my opinion. I think it depends on many things. did any scrapes or dings damage the boat? Dragged it up on the beach and wore all the coating off the bottom? But your assertion that somehow moisture penetrates in through the epoxy and can't get out just isn't logical - there is no one way valves in the epoxy :-) Yes, but my assertion is based on the idea that water will get in, no matter how you handle things, eventually. Once it wicks into small cracks and distributes itself within the encapsulation, it has a hard time finding it's way out again, as it doesn't have GPS either;) You may have had a great experience, of course you are a superior boat builder with a golden hammer too;), but most encapsulation jobs are not 100%, and like I said, once water gets in, it has a hard time finding it's way out and can cause a lot of problems. I still say, let the wood breath in and out, it's gonna' breath in anyway, so why not... Scotty You may be right but there have been thousands of plywood boats built that were sheathed, to the best of my knowledge all of the strip planked boats, of any size, are sheathed, a tremendous number of boats use plywood cores in decks. All of these are coated with epoxy. Epoxy is recommended by every paint company for sealing fiberglass hulls after doing an osmoses treatment and grinding off the gelcoat. This is not to say that water never, never, never, will get in but I suggest that the boats that are epoxy coated last better and are stronger then uncoated boats. Whether, or not I am a "superior boat builder with a golden hammer" is probably debatable but the recommendations I have given are all ones that I have successfully used. Cheers, Bruce (bruceinbangkokatgmaildotcom) There is a hell of a lot of difference between sheathing or laminating around plywood, and using a couple of coats of thinned epoxy as primer. Scotty -- Save the Ta'ta's!... http://tinyurl.com/ygqxs5v |
Paint
On Fri, 16 Apr 2010 10:36:57 -0400, I am Tosk
wrote: In article , says... On Thu, 15 Apr 2010 04:04:12 -0400, I am Tosk wrote: In article , says... On Wed, 14 Apr 2010 11:20:14 -0400, I am Tosk wrote: In article , says... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc With all due respect, that is not the way to go. I am going to assume he used regular exterior ply and it is more vulnerable to moisture damage than BS1088 or similar. If he coats it with two coats of thinned epoxy, moisture that gets in (and it will) can not get out. Wooden boats are best done old school with paint and sealer. A good wood primer, some sandpaper, and a couple coats of acrylic based paint, he doesn't want to use latex, at least on the outside, inside is ok... Let the wood breathe and the boat will last a lot longer... Scotty, just my opinion. I think it depends on many things. did any scrapes or dings damage the boat? Dragged it up on the beach and wore all the coating off the bottom? But your assertion that somehow moisture penetrates in through the epoxy and can't get out just isn't logical - there is no one way valves in the epoxy :-) Yes, but my assertion is based on the idea that water will get in, no matter how you handle things, eventually. Once it wicks into small cracks and distributes itself within the encapsulation, it has a hard time finding it's way out again, as it doesn't have GPS either;) You may have had a great experience, of course you are a superior boat builder with a golden hammer too;), but most encapsulation jobs are not 100%, and like I said, once water gets in, it has a hard time finding it's way out and can cause a lot of problems. I still say, let the wood breath in and out, it's gonna' breath in anyway, so why not... Scotty You may be right but there have been thousands of plywood boats built that were sheathed, to the best of my knowledge all of the strip planked boats, of any size, are sheathed, a tremendous number of boats use plywood cores in decks. All of these are coated with epoxy. Epoxy is recommended by every paint company for sealing fiberglass hulls after doing an osmoses treatment and grinding off the gelcoat. This is not to say that water never, never, never, will get in but I suggest that the boats that are epoxy coated last better and are stronger then uncoated boats. Whether, or not I am a "superior boat builder with a golden hammer" is probably debatable but the recommendations I have given are all ones that I have successfully used. Cheers, Bruce (bruceinbangkokatgmaildotcom) There is a hell of a lot of difference between sheathing or laminating around plywood, and using a couple of coats of thinned epoxy as primer. Scotty Now what? Are you going to tell me that an epoxy-glass composite is waterproof? After alleging that the epoxy isn't waterproof? If so, what makes it waterproof? The glass cloth? Cheers, Bruce (bruceinbangkokatgmaildotcom) |
Paint
Bruce wrote:
There is a hell of a lot of difference between sheathing or laminating around plywood, and using a couple of coats of thinned epoxy as primer. Scotty Now what? Are you going to tell me that an epoxy-glass composite is waterproof? After alleging that the epoxy isn't waterproof? If so, what makes it waterproof? The glass cloth? Yep. Cheers, Bruce (bruceinbangkokatgmaildotcom) -- Richard Lamb http://www.home.earthlink.net/~cavelamb/ |
Paint
"cavelamb" ""cavelamb\"@ X earthlink.net" wrote in message m... Bruce wrote: There is a hell of a lot of difference between sheathing or laminating around plywood, and using a couple of coats of thinned epoxy as primer. Scotty Now what? Are you going to tell me that an epoxy-glass composite is waterproof? After alleging that the epoxy isn't waterproof? If so, what makes it waterproof? The glass cloth? Yep. uh oh. I've created monsters! hehehe |
Paint
In article ,
says... On Fri, 16 Apr 2010 10:36:57 -0400, I am Tosk wrote: In article , says... On Thu, 15 Apr 2010 04:04:12 -0400, I am Tosk wrote: In article , says... On Wed, 14 Apr 2010 11:20:14 -0400, I am Tosk wrote: In article , says... Dave wrote: I'm building a 9 foot wooden flat bottom boat for myself and the kids. It' made out of 3/8" plywood from Home Depot and we're probably going to use it about every other weekend in the water. Where I'm at it's mostly salt water area (Gulf). My question is: Will normal Latex Exterior house paint will work? best to seal with 2 coats of solvent thinned epoxy or moisture cured urethane primer, then ext. latex.... paul - progressive epoxy polymers inc With all due respect, that is not the way to go. I am going to assume he used regular exterior ply and it is more vulnerable to moisture damage than BS1088 or similar. If he coats it with two coats of thinned epoxy, moisture that gets in (and it will) can not get out. Wooden boats are best done old school with paint and sealer. A good wood primer, some sandpaper, and a couple coats of acrylic based paint, he doesn't want to use latex, at least on the outside, inside is ok... Let the wood breathe and the boat will last a lot longer... Scotty, just my opinion. I think it depends on many things. did any scrapes or dings damage the boat? Dragged it up on the beach and wore all the coating off the bottom? But your assertion that somehow moisture penetrates in through the epoxy and can't get out just isn't logical - there is no one way valves in the epoxy :-) Yes, but my assertion is based on the idea that water will get in, no matter how you handle things, eventually. Once it wicks into small cracks and distributes itself within the encapsulation, it has a hard time finding it's way out again, as it doesn't have GPS either;) You may have had a great experience, of course you are a superior boat builder with a golden hammer too;), but most encapsulation jobs are not 100%, and like I said, once water gets in, it has a hard time finding it's way out and can cause a lot of problems. I still say, let the wood breath in and out, it's gonna' breath in anyway, so why not... Scotty You may be right but there have been thousands of plywood boats built that were sheathed, to the best of my knowledge all of the strip planked boats, of any size, are sheathed, a tremendous number of boats use plywood cores in decks. All of these are coated with epoxy. Epoxy is recommended by every paint company for sealing fiberglass hulls after doing an osmoses treatment and grinding off the gelcoat. This is not to say that water never, never, never, will get in but I suggest that the boats that are epoxy coated last better and are stronger then uncoated boats. Whether, or not I am a "superior boat builder with a golden hammer" is probably debatable but the recommendations I have given are all ones that I have successfully used. Cheers, Bruce (bruceinbangkokatgmaildotcom) There is a hell of a lot of difference between sheathing or laminating around plywood, and using a couple of coats of thinned epoxy as primer. Scotty Now what? Are you going to tell me that an epoxy-glass composite is waterproof? After alleging that the epoxy isn't waterproof? If so, what makes it waterproof? The glass cloth? Cheers, Bruce (bruceinbangkokatgmaildotcom) No, I am just saying there is a big difference between a plywood dinghy and a floating clorox bottle with a wooden frame stuck somewhere inside the layers of goo and fabric. Scotty -- Save the Ta'ta's!... http://tinyurl.com/ygqxs5v |
Paint
In article ,
says... "cavelamb" ""cavelamb\"@ X earthlink.net" wrote in message m... Bruce wrote: There is a hell of a lot of difference between sheathing or laminating around plywood, and using a couple of coats of thinned epoxy as primer. Scotty Now what? Are you going to tell me that an epoxy-glass composite is waterproof? After alleging that the epoxy isn't waterproof? If so, what makes it waterproof? The glass cloth? Yep. uh oh. I've created monsters! hehehe Nope, not gonna' argue with Bruce. Seen enough of his posts over the years to listen to what he has to say... Scotty -- Save the Ta'ta's!... http://tinyurl.com/ygqxs5v |
Paint
I am Tosk wrote:
In article , says... "cavelamb" ""cavelamb\"@ X earthlink.net" wrote in message m... Bruce wrote: There is a hell of a lot of difference between sheathing or laminating around plywood, and using a couple of coats of thinned epoxy as primer. Scotty Now what? Are you going to tell me that an epoxy-glass composite is waterproof? After alleging that the epoxy isn't waterproof? If so, what makes it waterproof? The glass cloth? Yep. uh oh. I've created monsters! hehehe Nope, not gonna' argue with Bruce. Seen enough of his posts over the years to listen to what he has to say... Scotty I'm not arguing with Bruce. Just telling what I've learned. -- Richard Lamb http://www.home.earthlink.net/~cavelamb/ |
Paint
Looks ok with Exterior House Paint - and it didn't leak! and a plus it
catches fish! http://tinyurl.com/2bp3hg6 Preview: http://preview.tinyurl.com/2bp3hg6 |
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