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<p>[QUOTE=&quot;Cherd, post: 1441191, member: 24754&quot;]If it&#039;s glue, then I can&#039;t believe that acetone did not cut it at all. If acetone didn&#039;t budge it, then I doubt WD-40 will do any better (the active ingredient will be an organic solvent, but other contents may damage or leave residue on coin surface). You may have to resort to chipping, but there is something else that you may want to try first. Soak the coin in distilled water for couple of days and then toss it into the freezer. If there are any open spaces under the &quot;glue&quot;, then some water may work it&#039;s way in there. The expansion of the water upon freezing may pop some of the solids off of the coin surface, or at least loosen it up a bit. </p><p><br /></p><p>This could work even better if you have access to a vacuum pump. Place the coin in a container, evacuate the air, then let water flood in. Removing gas from pore spaces within the glue will allow water to enter more easily.[/QUOTE]</p><p><br /></p>

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