Well, I hope you can wax over the decals. I just finished waxing the entire 5th wheel with Mothers paste wax, and applying Mothers Showtime after that. Decals and all, and boy is she slippery. Word of caution though, the front nose of the Crusaders are pretty scary to wax. I had really reach on the ladder and from the roof line, and all the time thinking this is going to make hell of a video if I slide off the front of this thing.
I also prefer the Zip Wax car wash soap from Turtle wax. I hit it before and after every trip decals and all.
2011 Crusader 298 BHD
2008 Ford F-250 4x4 CC W/ V-10