I have had the fifth wheel for about 2 years. I noticed earlier this year that it look like fading. I tried waxing it and still looks the same. It stays under a shelter so it's out of the weather. See attached pics
I have had the fifth wheel for about 2 years. I noticed earlier this year that it look like fading. I tried waxing it and still looks the same. It stays under a shelter so it's out of the weather. See attached pics Attachment 126917Attachment 126918
It may be under a shelter but, does the sun hit the rear wall during the day? That looks like UV damage (chaulking). You may get most of it out with a marine grade fiberglass deoxidizer. Then keep it waxed every other month or so.