Used a cover now for two years. Despite the pundits, no damage, scratches, or the antichrist arriving ahead of schedule. No yellowed clearcoat, no abrasions, nothing except a preserved coach from the elements.
The key is a fitted cover (mine is an ADCO) a thoroughly clean and polished coach, and routine checks on the cover tension and fit. I Liquid Glass the entire coach twice a year, including the roof. The wash is Liquid Glass car wash.
14 Serentiy 28' "Built by British Leyland"
74 IH 100 Travelall Custom "Sal"
75 IH 200 Pickup 4x4 "Hal"