I have an 88 bayliner 17ft basstryker with metalflake gelcoat on the top and inside the hull with brite white on the bottom and under the water line. I have compounded it and buffed it out but it does not last. The flake part feels rough to the touch. I want to fix some chips and minor scratches on the bottom part that is still repairable and probably paint the topside and inside the hull can I paint over the old metalflake gelcoat?