Quote:
Originally Posted by Snapolit1
I guess I don't get why cleaning with soap would be frowned upon, as long as you are not altering the surface of the coin in any way, but like everything else it's just a slippery slope down from there. I assume galleries clear old paintings all the time, but maybe I'm wrong on that.
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Soap usually requires rubbing, which causes wear, however slight. That wear would be the difference between an uncirculated grade from 60 and up and AU, almost uncirculated 58. (Don't try to make sense of the coin grading numbers, it's a 5-70 scale... )
But since most coins actually came from banks and simply never got used, they should all technically be AU unless they came from some sort of presentation set.