I managed to get some unintended racing stripes on the side of the hull while docking recently. The end of a dock, hit in a sideswipe at the fattest part of the beam. Fortunately the corner was covered with a dock corner "fender", but it left a yellowed stripe of vinyl about 6 inches long and 2 inches tall.Any suggestions on how to get that off my recently waxed gel coat?Thanks,Craig