What's your definition for the cause of swirl marks?

[Setec Astronomy]

Sorry, but... Why does plastic trim fade?

Because of UV-induced damage to the plastic: "The most basic and prevalent UV damage mechanism in polymers is called chain scission by photolysis – the breaking of long chains into shorter ones by the direct action of high-energy photons breaking the “backbone” of the molecule." From here: UV Degradation Effects in Materials – An Elementary Overview - UV Solutions.

Also, I might say there are eggs in a cake

Yes, of course there are, but the cake doesn't go stale because you washed the eggs out of it with Dawn.

[vaced]

"The most basic and prevalent UV damage mechanism in polymers is called chain scission by photolysis – the breaking of long chains into shorter ones by the direct action of high-energy photons breaking the “backbone” of the molecule."

That sounds pretty irreversible to me, but I'm no chemist(?). And I didn't read the article. Then again, I guess there are trim products out there.

Yes, of course there are, but the cake doesn't go stale because you washed the eggs out of it with Dawn.

The cake may not be stale, but that would explain the many bubbles.

In all serious though, thanks for the response and link.

[DanaDetailingPros]

Oh come on man! Just because you can find something on the internet doesn't make it true or accurate. And the proof of that is THIS THREAD IS ON THE INTERNET.

Clear coat is a catalyzed resin; it isn't self-lubricating and doesn't have oils in it. Hopefully this isn't going to turn into one of those discussions we used to have about trim, that trim fades because the oils in it dry out. And I would say "TRIM DOESN'T HAVE OIL IN IT". And the response would be "but it's plastic and plastic is made from oil", and I would say, just because the base monomers used to make plastic are made from oil, doesn't mean that there is oil in plastic. And the response would be "yes there is!" and I would say, if you put eggs in the batter when you are making a cake, are there eggs in it when you are done baking it? Can you squeeze the cake and eggs come out? No, you can't, because the eggs are chemically changed into dessert, just like oil is chemically changed in order to make plastic...or clearcoat resin.

With 14K plus posts I praise your opinions on everything!