I have been noticing something odd. The windshield has some white deposits, like calcium deposits. The tent isn't quite so shiny either, UV damage, chalky gelcoat is sluffing off the tent's roof. Automotive wax is OK but it takes a lot of effort because gel coat is soft and doesn't polish as easily as automotive paint. I'm working with some fiberglass boats so I took a little 3M Fiberglass Restorer and it is easy. Looks like new, but then again it is only a couple years old.