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Old 05-28-2017, 07:45 AM
Jacko34 Jacko34 is offline
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Join Date: May 2017
Posts: 7
Default Cleaning a penny with rough grime on it

I recently dug up a penny with some rough grime on it. It looked almost impossible to get off, but I didn't do anything to it because I did not want to ruin the coin too much. The coin is unreadable. Nothing on it is visible. How do I go forth cleaning this safely?

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