I wash mine every few months and find the wash wax below keeps it protected and looking good. I also use the 303 on the front and bugs and stuff wipe right off.
Premium Gel-Gloss Wash and Wax - Gallon
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Catalog Item # 19909
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Reg $27.77
Our MH was a bit faded when we bought it at 8 years old. After talking to some boater friends, they recommended "Pure Oceans Fiberglass Cleaner Wax". It's a house brand sold at West Marine. It did a good job on our motorhome. It's compatible with power polishers, too.
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Frank and Eileen
No longer RVers or FR owners