I have a ski boat that has some soft spots in the deck (floor) i want to apply plywood over the fiberglass floor. On a budget here. Then will carpet over the plywood. Looking at using MDO. Will PL 3x Premium adhere the MDO to the fiberglass deck? Do i need to fiberglass over the MOD before i carpet? I have seen varying opinions. If the PL 3x Premium is not sufficient what should i use?