Thread: F30 Glass soft?
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      01-31-2013, 08:05 PM   #43
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Drives: F80 M3 MG
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Originally Posted by BavarianFanatic View Post
This is something many folks fail to understand which is why I warn against it unless you really understand how to do it properly. Water spots are nothing more than a build-up of lime, calcium and other minerals on the surface of the glass. They're not defects or scratches in the glass itself that you're trying to "polish" out.

My point was that people automatically think of glass as being really hard and durable. They don't understand that something as simple as rubbing against glass coated with dirt, sand or anything abrasive can scratch and gouge the glass fairly easily. And it's not a simple matter to "buff it out".
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