I just painted my 28 Leatherback with Rustoleum 2X rattle cans. The result was too blotchy so i wet sanded it to a smooth finish...but semi-mat finish. What should i seal the paint on the cowl so that even minor gasoline spills dont take off the paint? Rustoleum customer service has no recommendation. Should I be concerned and should i consider a urethane? What's the recommended wax polish to add some shine?