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<p>[QUOTE=&quot;GDJMSP, post: 1282927, member: 112&quot;]Well I wouldn&#039;t use soap of any kind because soap leaves behind a residue that will in time be just as harmful as whatever is on them now. And normally I wouldn&#039;t recommend that you try to clean them at all. But the exception to that rule is when leaving them alone will itself be harmful. And from your description, that is the case you have.</p><p><br /></p><p>Just soaking the coins in pure acetone may do the job, or it may not. It depends on what the substance is on the coins. But if acetone doesn&#039;t do it, then try xylene. But whichever product you end up using, make sure that you soak/dip each coin in 3 different containers of solvent. And don&#039;t re-use the solvent. You can put multiple coins at he same time in the first two containers. But make sure you dip each coin individually in clean solvent in that last container.[/QUOTE]</p><p><br /></p>

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