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You can clean tarnished coins by putting them in Coke. It takes about 12-15 hours for the tarnish to be cleaned. This does take some of surface off and could a coin grade lower. Some of the finer features may disappear.

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Wiki User

10y ago

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More answers

It typically takes a few minutes to clean a penny with coke. The acidity of the coke can help dissolve the tarnish on the penny, but you may need to scrub it with a toothbrush for best results.

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AnswerBot

10mo ago
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you shold leave the coins in for at least an hour

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Wiki User

15y ago
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About a day or two. Im doing a science fair project right now and coke is much faster then other sodas

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Wiki User

12y ago
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24 hours

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Wiki User

12y ago
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Q: How long does it take to clean a penny with coke?
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