Last year My wife and I bought a used Cougar 5th wheel - the tire cover on the back was first painted in a paint shop - next owner painted it with a paint brush, put mask down, cut it with a razor blade, painted more with his paint brush then let it weather in the sun for years. it had a crack I fixed with JB Weld, kinda knocked down the brush strokes, brush hairs, dirt and top paint with a light sanding before painting with rustoleum rattle can - still not pretty but better.
Tonight I added a little graphic to it that hides a lot of the stuff. learned a little more about wrapping a compound curve (small one) and will call it good enough.
Picture of front of camper was last years addition and stacey wants her window blocked out so I need to add her side graphic on the window yet