Hello, I have a 2016 Newmar Canyon Star Motorhome with a fiber glass roof. Any time that it rains or when I wash the RV and even when I wash the roof and hose it down, I get severe white streaks...
I wash my roof good with Dawn and a brush. Then I recoat the roof with Dicor using a paint roller with an extension handle and paint pan. I put two coats on waiting about three hours between coats.
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