re: Canoe

I can’t speak from any experience on the Tightbond III issue. I’ve never used it and in 40+ years of boatbuilding, haven’t run across anyone else using a PVA glue other than perhaps on interiors. I know epoxies are expensive but I think I’d stick with them (pun incidental). My preference has always been Cold Cure (now a System Three product) but WEST is OK as well.

However, I have to comment on the polyester idea. Don’t do it! Polyester is not an adhesive. In fact the only thing it will reliably stick to is other polyester resin (think fiberglass boat). Especially for the chines, you MUST use epoxy. Polyester seams just won’t withstand any kind of trauma at all. PM me if I can help.