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Old 17-06-20, 09:03 PM   #2
mikes2
4 ring whore!
Classic Audi Club Member
 
Join Date: Nov 2007
Location: Polmont
Posts: 2,504
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Used to be an old trick of denture cleaning tablets.

Block the drain and leave it to soak overnight with a couple of tabs. May need some agitation to get the worst stains off.
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1991 90 quattro 20v sport
1988 90 quattro 2.6 TSR
1991 90 quattro
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