EEEEEEK! Coin cleaning advice from the Federal Reserve Bank!
ms70
Posts: 13,954 ✭✭✭✭✭
From the FAQ section: 
<< <i>QUESTION How can I safely clean old coins?
ANSWER Ordinary coins, if they are in reasonably good condition, may be freshened by rubbing them with cheesecloth or cotton that has been moistened with a paste consisting of baking soda and a few drops of water. Once a coin has been tarnished, there is no way to completely restore it to newly minted luster.
The condition of a coin is an important aspect in determining its value as a collector's item. The finish could be inadvertently destroyed, or seriously affected by, the indiscriminate use of a cleaning agent. If you believe that you have coins that are, or could be, of numismatic value, you should seek advice from a coin dealer or collector regarding methods currently being used to clean coins.
DATE 03/04/2004
CATEGORY Currency and Coin >>
Link
<< <i>QUESTION How can I safely clean old coins?
ANSWER Ordinary coins, if they are in reasonably good condition, may be freshened by rubbing them with cheesecloth or cotton that has been moistened with a paste consisting of baking soda and a few drops of water. Once a coin has been tarnished, there is no way to completely restore it to newly minted luster.
The condition of a coin is an important aspect in determining its value as a collector's item. The finish could be inadvertently destroyed, or seriously affected by, the indiscriminate use of a cleaning agent. If you believe that you have coins that are, or could be, of numismatic value, you should seek advice from a coin dealer or collector regarding methods currently being used to clean coins.
DATE 03/04/2004
CATEGORY Currency and Coin >>
Link
Great transactions with oih82w8, JasonGaming, Moose1913.
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Comments
What if some disease was traced to our money as being a carrier of this disease and the gov. started cleaning all coins and currency, abrasively as they were cycled through the banks.
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