Re: Motorhome wax
"Mothers California Gold" IS a carnauba wax. I think someone was feeding you bad information about carnauba penetrating fiberglass.
Boats are usually fiberglass, and they're waxed frequently, as are Corvettes and other vehicles.
But, if you're looking for a product that's not carnauba based, try our FX line - SynWax is a synthetic wax that's exceptionally easy to remove - which would be a bonus when working on lots of square footage like your motor home.