|Cleaner/wax application half done on the sheer stripe|
What is it about dark gelcoat colors? They seem to oxidize so much more quickly than the white. Red is the worst, for some reason. Dark blue is a close follower.
Could it be that their color absorbs infrared (heat) radiation more readily, making them hotter? (Chemical reactions double in rate, roughly, for every 10° rise in temperature.)
Could it be that the white pigment (almost assuredly titanium dioxide) does a better job of protecting the interior resin from UV than the pigments used for the dark colors?
Or could it simply be that oxidation on white doesn't show because it is, well, white? Actually, having rubbed out Eolian's entire hull several times during our ownership, I'd have to say that the oxidized layer on the white is definitely thinner than that on the green.
So I kind of think there is something special going on with the dark colors. It is that way for automotive paint too... the dark colors, and especially red, fail first.