Posted 04/16/2015 11:36 pm
The best way to prevent future "rust" is to first remove any foreign material on the coin that may interact with the metal, then put the coin into an airtight protective holder, and finally store the coin in a cool DRY place.
Olive oil is probably the best corrosion preventive that can be safely used on copper coins, but it WILL cause a color change, so it would be unwise to use it on a valuable uncirculated coin
One final measure of precaution to really ensure your coin collection is kept from the environment's corrosive tendencies is to take photographs of both sides of each coin. It can significantly reduce the effects of unnecessary handling when you can share pictures instead of fingerprints, in addition to digitally documenting the coins in your collection for insurance verification.
Olive oil is probably the best corrosion preventive that can be safely used on copper coins, but it WILL cause a color change, so it would be unwise to use it on a valuable uncirculated coin
One final measure of precaution to really ensure your coin collection is kept from the environment's corrosive tendencies is to take photographs of both sides of each coin. It can significantly reduce the effects of unnecessary handling when you can share pictures instead of fingerprints, in addition to digitally documenting the coins in your collection for insurance verification.
