Thanks everyone for such a great set of replies and valuable information for my first Good Sam post.
I can see there is quite a variety of types of polish and wax and of decals and experiences.
I've intended to do the same kind of upkeep on my TV but find I'm lucky if I wash it regularly,and I got the RV before an inside place to keep it, and I now expect it shall remain an outdoor pet.
So I like the idea of just keeping it washed and cleaned over waxing or polishing it once or several times a year. But I might try the 303 or polymer based stuff described as a one time or annual thing though, you know, in the Fall, or in the Spring, when you want to spend some quality time with your RV?
Thanks again for everybody's great info.