1. You don't want to know how often Milt washes/waxes our RV... He does it every time we bring it home to get the road grime off it. I have told my RV friends he is the original Mr. Clean. 
2. He washes it with Simple Green and a soft long handled brush. Rinses it good.
3. He polishes it with ProtectAll. Buys it at Camping World. It has Carnauba Wax in it. He sent directions how to use it. Buy it in a gallon jug, as it's cheaper. Place in an old spray bottle, like a Windex Bottle. Shake well before using. Spray it on in small squares, use a clean rag to wipe it smooth and polish it. If it streaks you have used too much. It is easy to use and works really good. It Polishes, Waxes, Protects, Treats (like rubber and such) and protects. Gives a showroom shine.
He does the work himself and has never paid anyone to do it for him.
Hope this is helpful.
Happy RVing!
Joella