Darker colored campers have the fading problem. My Outback started looking bad on the front cap (brown) after only a year and a half. Dealership worked on my problem, and Keystone finally agreed to a new re-paint. It still cost me over $1000 to replace the graphics and the dealership installed them. The actual repaint cost me $0. Repaint was the only solution. Dealership told me the company that actually does the repaint, says the repaint will last longer than the rest of the camper. It's been 3 years now since the repaint, and it's still shinning great!
This may not be what you want to hear, but repaint is about the only solution. Depending on the age of your camper, check with your dealership and see if there is any negotiation room with the RV manufacturer to honor (unknown) warranties.
Funny, we got the extended warranty on our camper, only to find out it covered EVERYTHING except paint! That was the only exclusion. We were furious. That's when my dealership got into an arm wrestling match with the manufacturer (Keystone), and won the match for us! So check with your dealership, you just never know how it will come out.