At what point is a coin considered cleaned? If you pick a coin up out of the mud and wipe your thumb across it so you can see it is a quarter has it been cleaned. You wipe it a couple of more times so you can see the date? You run it under water? You dip it in acetone? You work it over a little with a Q-tip? I know taking it out to the shop and using the wire wheel on my grinder would count as cleaned but are there things you can do to improve the look of a coin that would not count against it if you sent it in to be graded? I picked up an Unc. set of
War Nickels the other day and 2 of them have a green spot on the front that I would like to get rid of but don't want to do anything that would devalue the coins.