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Old 09-03-2015, 10:59 PM   #7
stugray
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Join Date: Sep 2013
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Quote:
Originally Posted by jawn View Post
Nuke the site from orbit.
It's the only way to be sure.


Seriously I think this happens when condensation collects dust then as the water evaporates, it leaves those marks.
That is likely a horizontal surface and car experiences extreme ambient temp & humidity changes? (like driving up/down mountains?)
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