Whether you're a novice coin collector or just want to clean some collected pennies with your kids, here's what to do (and not do!) when cleaning old coins.
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Effective Ways to Clean Pennies and Make Them Shine
How to Clean Silver Coins: 7 Steps to Safely Restore Your Tarnished Items
Best way to clean this corrosion off? I know cleaning is not recommended, these zinc ores are in pretty rough shape though. : r/coins
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