Im ready to buy the plywood for my floor.From what i read i need to buy abx or aax plywood. If i can get marine plywood is it better than these other 2 or just the same.I am using the Thicker polyester resin & a fiberglass cloth to cover it.What i thought about doing was cutting my pattern out just like its going to lay on the floor & fiberglass it before i put it in & then do it again once i lay it in, with 2 coats on top.