We've used all kinds of stuff, but, at the moment, we're using Meguiars wash and wax to do the washing, and a Meguiars wax on the exterior. Also use a CR Spotless to wash and rinse, and it does what it says. Hadn't dried a vehicle since purchase and absolutely no spots. Sometimes we use Mary Moppins Advantage on the exterior, but not many have heard of them. Good stuff. We use 303 on the tires and seals. I've tried 303 on the exterior fiberglass, but it's too aggravating to me, streaks and is hard to get off, plus it does not last like a wax or the Advantage does. Just our 2 cents. Others have their own methods.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.