Dull finish on motor home of friend

[werni9]

I want to help a friend with a white motor home. It has a flat look to the finish. I read that Krud Kutter was a good way to clean the corners and get that built up dirt and grime off. THEN, of all products I was told to try ZEP High Gloss Floor Polish :h
After a good wash, they said to apply about 5 coats. Wipe on with micro fiber towels, let dry for 30 minutes and apply next coat.
WOW.......
Any thoughts.
Thank you.

[donn0128]

Zep is an interior floor finish and will do nothing to protect the surface. It will oxodize.
If the outside is fiberglas, then there are lots of products designed for it. 3M, McGuires both make excellent products designed for fiberglas boats and RVs. It will take effort to make it look good again, and it takes effort to keep it looking good.