Cleaning your coins is your preference but when it comes to coins you want graded, well, in about two weeks I'm going to find out the hard way as that is when I get my next set of coins back from PCGS. I have done acetone dip with success and great results, undetectable. However, this time round I had a few coins that needed a little more effort and chose acetone with a light brushing using a fine tipped artists brush. Under 10x magnification, I can see the areas of the coin surface that I had lightly brushed.
How long would you recommend leaving pennies in the Hydrogen Peroxide? While we're on the subject, how long for ancients as well? Also, what do you do with the ancients immediately after you take them out?
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