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Respray time


dandan62

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Red fibreglass was/is notorious for this; GTMs used to suffer this badly and red was a very popular colour in them. I'm sure it was down to something used as the pigment, that made it the worst colour for being affected by UV rays. Back in the 90's I used a special polish that was supposed to minimise this (a boat polish) on my GTM and it kept it pretty well for several years. 

Mind you this is all bit "after the horse has bolted" for you, sorry :D !

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Basic science.

Red paint absorbs yellow through blue light and reflects the red only.

Red light has the least energy and blue the most energy, beyond blue is ultra violet, X rays then gamma rays with more and more energy.

The energy from the absorbed blue light has to go somewhere, it mostly becomes heat but some breaks chemical bonds in the pigment which shows as fading.

So blue paint reflects the energetic light and is fade resistant. Most red pigments fade in sunlight UV blocking polishes help but are not perfect.

Edited by IanS
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