It depends on how they are made.
Pre preg have UV inhibitor in the resin.
Wet layup will usually need to be protected although I think West are now selling a hardener with UV inhibitor in it. Other manufacturers may also have this. Basically you need to find out what it was made from.
I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!
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