I was told that it is the clear coat breaking down. I never quite understood it though as I have been under the impression that the original paint was a single stage job - not base coat, clear coat...
So, whatever I have just told you, please do not take it as the absolute truth!
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Dale
1995 E320 Wagon 185K [SOLD]
1988 260e Sedan 165K
2007 F-150 XLT 188K [SOLD]
2003 Harley Davidson FLTRI Anniversary 26K
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2006 BMW 330Ci 110K - [SOLD]