Coin cleaning

in Q & A Forum
Can you clean coins with a jewelry cloth, 100% cotton, without affecting grading?

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Comments
Rubbing a proof coin would be an extremely bad idea...you will definitely cause hairlines.
Gently rubbing a little haze off a mint stae coin is usually OK and often effective.
Trying to rub off anything other than a light haze usually doesn't work.
Thanks,
David