I had a 12 ft service truck with a fiberglass spartan body that was very oxidized, I used gel-gloss rv wash and wax, with very ,very hot water. Turned the driveway white because all the oxidation ran off. Use a soft bristle brush, after 3 washes like this, truck body looked almost new,(almost). I was very happy with results. Use it all the time and you will see less and less white in the driveway, and body will look better and better. Hot water is a must to achieve these results.
2013 Fleetwood Terra 35K