I had a product called Super Poly Steel exterior gloss preserver applied to our Voltage 3200 by the dealer. It came with a 3 year warranty. Then while I was sitting around bored one day I decided I was going to wax everything I could reach with a good Name Brand carnuba wax. A couple of weeks ago we had some very warm weather in the area, and I decided I was going to go out and start cleaning on the RV. To my amazement I found that everywhere I had waxed was black streaked and the areas that I couldn't reach that still had the Super Poly Steel had no black streaks what so ever. The streaks did wash off fairly easy where I had waxed but I ended up ordering a kit from the dealer so I can re apply the coating myself, and I think I will continue to use this product. Don't knock it until you try it.
Retired Firefighter, 2008 Silverado 3500HD, Husky 26K Hitch pulling a 2013 Voltage 3200 Epic with a 2003 Harley FLHRCI and a 1998 EZGO Golf Cart in the toy box