I'm presuming your motorhome is now polished and looking fine!
If not, we just bought a badly oxidized 1997 landyacht 30, and are in the polishing process, using Meguires products - first, apply then buffing, then wiping off residue or oxidation remover. Next apply and wiper off polish ( like a moisurizer for fiberglass), then finally applying, buffing and wiping down the wax. Not quick, but not as painful as it sounds
There are many posts about using acrylic floor finish, but we opted for the elbow grease.
What did you end up using, and how does it look?