Sorry, I missed the part that it was a fiberglass roof. I would think that you would use the same cleaners etc that you use on fiberglass boats or cars (Corvette).
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Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, Seasonal since 2000.
Car Shredder Op/Tech, Scrap Metal Recycling - retired
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