I belong to a lot of email groups that discuss, barter, and sell ancient coins. I just read one of the newsletters, and Kevin who runs Noble Roman Coins, is giving away a free download of a 250 page powerpoint about cleaning ancient coins. I know that it is not everyones cup of tea, but here it is, click here. I have read the first 45 pages, and it is good, the advice is well organized and thorough.
If you do not know I wrote a pretty popular guide to ancient roman coins on ebay, click here. I wrote the guide during my last semester of grad school in Iowa, so that was in 2006, the information on pricing is out of date mostly due to the bad exchange rate with the Euro.
