I'm building a 15' Phantom sailing dinghy from plans obtained by the designer, and the boat was designed in '71 and was built using sticth and glue construction with fiberglass and polyester resin. I'm using epoxy and glass on my boat however. The plans call for the seams to be reinforced with 4" glass strips, but no glass covering the rest of the hull. Having done some research on stitch and glue, I find that a lot of builders do cover the hull with a layer of glass and epoxy. I'm wondering if I really need the glass cover over the entire hull. I'd like to keep the weight down as much as possible. If I don't use a glass skin over the 6mm ply, what would be a suggested finish technique for a painted hull?