LAC Red paint prone to oxidation?

[Al S]

When the paint mixture went from oil based to water based a lot of problem
have come up. Longevity is one, fading is also a big problem. Red is the
worst but silver or aluminium can fade too. I have also seen the paint hold
up but the clear coat peeled.
Al

'90 80

-----Original Message-----
From: quattro-bounces at audifans.com
[mailto:quattro-bounces at audifans.com]On Behalf Of Alex Kowalski
Sent: Thursday, February 23, 2006 9:37 AM
To: quattro at audifans.com; larrycleung at gmail.com
Subject: Re: LAC Red paint prone to oxidation?


Larry Leung wrote:

>A former collegue, whom was an engineer at PPG said that the pigments
>in red paint (FeOs) are prone to oxidation, and added that red is the color
>most likely to fade in panels (i.e. the door will fade to a different shade
than
>the fenders, and even within one panel, it'll fade in panels, for example
>above a moulding line could fade to a different shade than below). So as
>an across the board statement, I think it's safe to assume reds are the
>worst.

I'm already seeing this on the Tornado Red '86 5KCSTQ I recently purchased.
This car had been garaged throughout its life until the head gasket blew,
and I can already see the effects of oxidation from it having been outside
for the past two and a half months.  Needless to say, I'm going to cover it
and when I do the engine swap I also want to protect the paint as best I
can, because it's pristine except for a few chips on the front spoiler.  I'm
not seeing any adhesion problems, just a barely-detectible oxidation film
that I want to do my best to prevent getting worse.

Cheers,
Alex
'87 5KCSTQ, '86 5KCSTQ (red, almost perfect paint, but oxidizing without
proper treatment.)
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