I have just painted the interior of my boat with West Marine Non-Skid Enamel. It dried to a high gloss finish which will be reflective of the sun. What can I put on this finish to dull it down a bit. I need a second coat to complete the coverage. Can I paint over it with a satin finish or something other than the same as the first coat and it adhere to the first coat of paint? I can't sand the non skid (as every paint I've looked at recommends for proper adhesion) without removing the non-skid.