Quote:
Originally Posted by Jens Eskildsen
Most people dont have a polish mashine specifically for brake pistons...Thoose who do, dont ask for advice on the internet, so cant see how thats helping the OP.
Anyways, perhaps a fine scotch brite pad could be a happy thing in between, which just about anyone have access to, to use for the more subbern dirt/grime/brakedust?
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A scotchbrite pad lubricated with brake fluid is what I've used to clean up the seven or eight brake pistons I've had to make decisions on over the last few months. Similarly, a small piece torn off the pad is what I've used to clean up the seal groove in the calliper.
If the scotchbrite pad doesn't clean up the piston to the point where it slides easily in the calliper or if there's any marks at all in the region where the seal moves then the piston is scrap as far as I'm concerned. They're cheap enough not to take a chance on - although some of the brand new aftermarket replacements I've been sent have been a worse fit than the rusty originals.
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