Part of the problem is that the gel coat finish on nearly all the RVs is a poorly installed product, even described as being thinned down. Unfortunately, it is never as good as you will find on a good boat. After a few years the finish will start to break down and oxidize. If exposed much to the sun, especially in a dry climate, the vinyl decals they all use have a short life.
That said, I used Meguiars to try and stay on top of the finish. I put on the polish then cover it with wax. Six months later it is ready to do again. Their is also little out their that doesn't require alot of elbow grease. I went to Harbor Freight and bought a high speed buffer. Be careful with them as they can eat through you finish on high speeds. My brother solved the problem with his front cap oxidizing by having a professional paint job done.
Willcamp4
2012 Ford F-250 Super Duty, Crew Cab, Lariat, 6.7L PSTD, Air Lift rear suspension.
Alpenlite Valhalla Limited Fifth Wheel, two Solar panels, four six-volt batteries, two Honda EU2000i generators