Quote:
Originally Posted by Yo-Hi.Red.Devil
Is this after you had a very dirty inside pipe? I'm talking years of soot that's never been removed.
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FWIW, I recently tried cleaning out my exhaust tips on my 328i. CPO with 37,000 miles. Looked like it was never cleaned. I got Mother's Mag /aluminum polish, took out the dremel with the polishing white fabric tips, and went at it. 30 minutes later.... any shiny spot on the exhaust looked great, but it couldn't lift the "years of soot that's never been removed." I still have yet to tackle that. I'm sure steel wool or something will remove it, or if I used one of the more aggressive polishing wheels in my sanding/polishing kit. But I haven't yet. I can just say that however much you try by hand, you can't get that grunge off with the mag/alum polish (fine, you could, but it would take hours/days of vigorous rubbing. Who has time for that?).