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Unless it's a 1943 copper penny.Not worth having them professionally cleaned in my opinion.
I think cleaning with a toothpick is probably safe. Let it soak in distilled water for 24+ hours and then just rub the surface with small circular patterns. Don't press hard. As soon as you start using chemicals it seems to do more damage then good.Is there such a thing as having copper coins cleaned professionally? There seems to be a hundred different opinions on how to clean them but I would rather leave that in the hands of someone who has lots of experience not like myself.
Cleaning copper coins that have been in the ground is basically an exercise in futility.
Around here, just about all copper coins that come out of the ground are toasted except for the newer copper Lincolns and an occasional Wheat Cent.Not true, unless the copper is toast to begin with.
Around here, just about all copper coins that come out of the ground are toasted except for the newer copper Lincolns and an occasional Wheat Cent.