I did this last week to my 2004 filon sided fifth wheel. It had sat in the harsh Florida sun from Aug 2003 until I bought it as a new leftover unit in December 2005. The nose and tail caps are PVC and were badly chalking as were the sides. I must say, it did a fabulous job for an old looking well used camper. We just put up the new RV cover a few weeks ago so working out of the sun was fun. Last spring, I removed the old graphics by taping off where the old had been and painted on new graphics with Krylon paint from Walmart saving over $1,000 instead of new graphics. You might be able to see in the cap before photos where I removed the old graphics. In the after photo, most of the white where the graphics was is now not as noticeable. I was going to apply an automotive clear coat this spring until I started reading about Red Max Pro on several websites.
I decided to do the floor polish instead. Thanks to everyone who tried this experiment befor me.
Before:

After:

The sides now look new:


