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#21
posted to rec.boats.building
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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) |
#23
posted to rec.boats.building
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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) |
#24
posted to rec.boats.building
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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/ |
#25
posted to rec.boats.building
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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 |
#26
posted to rec.boats.building
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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 |
#27
posted to rec.boats.building
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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 |
#28
posted to rec.boats.building
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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/ |
#29
posted to rec.boats.building
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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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