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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) |
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