My buddy and I are building a koholo. Actually, he's providing the workspace, tools and woodworking experience while I provide the money and labor, but it's a good setup and I'm learning a lot. Anyway, he's never built a boat before and is wondering why we shouldn't just fill this thing up with spray in foam. Wouldn't that cut down on the breathing problem and add a level of assured floatation in case of a hull breech?
Please tell me to talk him out of this if it's a terrible idea.