Covering them is obviously the best way. I have been a fan of Aerospace 303 for a long time and find its UV protection works on all my vehicles' black trim. It may not be THE answer for uncovered RVs but I've started using it on our ROO since we picked it up in April. Time will tell...
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Theo & Carol
2007 GoldenDoodle ("Cooper") R.I.P.
2020 Rockwood Roo 23IKSS
2015 F-150 4WD XLT SCab, 5.0L, 3.73, 36gal, HD Towing Pkg (53A), 1,980lb Payload
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