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<p>[QUOTE=&quot;green18, post: 1957354, member: 10103&quot;]Vinegar has acid so steer clear of that.&nbsp; Soap will leave a residue on the coin which may show up weeks later in the form of spotting.&nbsp; The acetone shouldn&#039;t harm anything.&nbsp; Soak the coin in the acetone for a few minutes and observe the results.&nbsp; Longer soaks may be required.&nbsp; Just don&#039;t forget about the coin that&#039;s soaking.&nbsp; After you feel that the coin is ready to come out of the bath, rinse it with distilled water and allow it to dry on a soft surface.[/QUOTE]</p><p><br /></p>

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