Nothing can fix peeling clearcoat except a proper strip (sanding) Base coat and new clearcoat. I know that sounds like it is excessive but that is the cure. You are one of many owners that have the problem, have had the problem or are waiting for the problem to surface. It is common on gelcoat over luan paneling that manufacturers used to side our motorhomes, mine included. Good luck and seeya on the road..
2003 Newmar Kountry Star 3905, Freightliner XC chassis with CAT 330. Winnie the black lab, pretty Airbus captain wife, retired airline pilot with 11 grandkids. UH-1 pilot (Huey) U.S. Army 1967-1983. RVN 68-69. Northern Idaho my summer home.