Unfortunately, someone put a cover on my trailer some time in the past, with the result that the clearcoat was damaged, and became opaque in large areas. I had to strip and re-coat. The movement of a cover in the wind, plus high humidity under the cover may well account for this. The standard advice is not to use a wrap-style cover. I built a pole barn for six hundred dollars, and this protects amply.
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."