Not so much as the paint, but there are a few items that are made of plastic that are not UV rated and can turn yellow. On my coach;
Cable TV Inlet Box.
Range Vent cover.
Plastic trim corners on the slide out.
Plastic trim end caps.
have all yellowed. This is after 4 years, even in the moderate Michigan sun (and the RV is kept under cover in the winter).
The simple and effective solution is that I have begun to paint these areas with white paint, as if these plastics are allowed to continue to yellow from UV damage, they can pit and become brittle and eventually crack.
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The only thing that works on a RV is the owner...
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