Every one has their own way of doing this, I like to do some that are heavy in organic matter, more than one at a time, then a good rinse, distilled water I find the best, then if needed place one coin at a time, from that batch in a small "baby food jar", with some fresh acetone for a day or so, and pat dry, do not rub, and wala, presto, you are done.Do not re-use the old acetone!!It is then contaminated.
I am sure more members have other ways to achieve to same goal, a coin free of organic matter as best as you can get besides having it done professionally.
This I only use on silver coins, copper, I am not sure of the results, maybe others will have better advice, good luck, Mike....
Edited by Morgans Dad
01/31/2010 7:06 pm