Zep Floor Wax
I recently purchased a 88 36' Gulfstream Classic, It was in pretty good shape overall but the fiberglass finish was badly dulled and had medimum oxidation. I read a lot about people using floor wax to shine up the fiberglass, one product is Red Max can be purchased at Lowes, the other is Zep home Depot carries this, i guess their made by the same company, Home Depot carries 2 kinds of Zep, a high gloss for 25 bucks a gallon and a regular gloss for 15. I used the high gloss, I followed the advise of the people that have done this and purchased a can of Bar Keepers Friend, i scrubbed the rv down with a green scrubbie, used only half a can of Bar Keepers for the whole job, then washed it down with mild dish soap, prep time took about 4 hours, i had one other person helping me.
Then the waxing begun, used a microfiber towel and applied 5 coats, wow what a huge difference. The first picture is before.