The follow links is how I got the information for this procedure. Take your time and do a section at a time. I have a 36’ motorhome and there is no way to get it done quickly. It took me two days just to do the front. (hood area and around the windshield)
Read the links and it will guide you through the process perfectly.
This is how I learned how to clean and apply the wax:

-Zep Wet Look Floor finish (Step 3) (available at Home Depot)
-Bar Keeper’s Friend (powdered)
-TSP (Trisodium Phosphate, powdered)
-3M scrubbies (white, fine)
-Microfiber rags (white or laundered)
-Latex gloves