I too have that problem with glass mark and chips. Jim are you going to try that stuff that you talk about. Let us know how it works.

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Silver Honda Accord, 2006
Silver G500, 2003
Silver SLK-320, 2002
Black ML-320, 2000
Bule Porsche 993 Targa , 1997
Silver Merkur XR4Ti, 1987