Waxing

There are many products made for boats that work well but that is if it is a gel coat fiberglass with decals. If it has a full body paint than I would use a clay bar to remove any oxidation/debris and then a good quality CLEAR COAT safe cleaner/polish to bring back the shine. Do it in the shade and only do a few square feet at a time.

I am sure that the interior floor wax proponents will be here soon to tell you everything good about floor polish on your RV.