Cleaners & Cleaning Supplies - Brebbia Stem Polish (7.5 ml)
Remarkable stuff!
There may be similar products out there that I am not aware of. All I can say is this stuff is remarkable! The TINIEST amount cleans up vulcanite, removes light scratches on acrylic, even polished nickel parts on my Peterson pipes. Takes a bit of effort but no other polishing product I have tried has come close.

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