Your boat is great; I built small (model) sailboat when I worked at Sikorsky and waterproofed it by pouring liquid crazy glue on the hull and letting it dry. Not something that would be considered very green today but it sailed in a water based coolant (Lusol) and never came apart. I still have it, it is 20 years old. One of the balsa wood seats fell out but it would probably still float, I guess I'm rambling now.