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<p>[QUOTE=&quot;stldanceartist, post: 1211909, member: 13307&quot;]So, as an update - I decided to take a few people&#039;s advice and soak the coin in acetone.&nbsp; The green goo on the back was definitely PVC contamination - gooey, pliable - and would ultimately corrode the coin.&nbsp; Soaked the coin in a solution of 100% acetone for 1 hour.&nbsp; Removed coin and used a non-abrasive rose thorn to &quot;remove&quot; some of the larger areas of green gunk.&nbsp; Then...used a gentle application of MS70 to remove the rest.&nbsp; Rinsed the coin off in distilled water, then a quick dip in acetone.</p><p><br /></p><p>I have to say that I am really pleased with the results - here are photos for comparison.&nbsp; Feel free to share any thoughts.</p><p><br /></p><p>[ATTACH]128201.vB[/ATTACH][ATTACH]128202.vB[/ATTACH][/QUOTE]</p><p><br /></p>

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