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Lighter colors show more, it is hardly noticeable my wife's dark blue 98 but sticks out like a sore thumb on speed yellow. If you wipe with a cloth on a dark car it will come up dirty.
If it was brake dust I would have had to replace pads, could be tire dust, the life of my last two sets of rears was appalling. I think it is oily exhaust fumes, a bit of road grime, some tire dust, some brake dust and even some poodust on occasion.
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2001 Boxster S 3.6L, Zeintop
"Calling upon my years of experience, I froze at the controls." - Stirling Moss
Last edited by landrovered; 08-03-2011 at 11:49 AM.
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