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I have heard that white car paint turns a bit yellowish, but never really saw a convincing evidence or explanation for it.

So, is it true? And why?

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If you're not whitening, you're yellowing! –  cnst Jun 22 '13 at 5:43

1 Answer 1

up vote 6 down vote accepted

With any paint, there will be a degree of fading and yellowing from the UV radiation present in sunlight.

If you look at old cars which have been left in the sun, they look uneven in colour and often quite faded. This is normally repaired by cutting away the "dead" and faded layer of paint.

With modern paints this effect is reduced compared to older paints, but they will still fade over time. This gives problems when cars are resprayed after accident damage, as there is normally a visible difference in the colour between panels.

http://en.wikipedia.org/wiki/UV_degradation

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