RE: I really Dumb Question But
on myth busters.. they made a mold fro a 57"large RC deep V hull to test a theary on. They wanted to see if you turn your boat into a pole in the water at 35mhp would it going into the hull half way in?? they made a silicon mold to make four hulls to test.. but if you do make it out off plaster.. after you make the mold you need to paint the inside where your going to lay the glass up on.after you paint it let it dryout for two day then use a wax/reless agent on it first then layout your fiberglass cloth..after the cloth drysout then it should pop out of that mold.