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<p>[QUOTE="dannic113, post: 1413697, member: 35203"]Without pics it's a shot in the dark here but if the spots are black they could be the start of toning but more likely are carbon spots. Something is reacting with the copper used to strengthen the silver. If the spots are green looking mold the plastic that they are stored in may contain PVC and is damaging the coins. PVC damage can be helped with 100% acetone (hardware store not nail polish acetone see other CT posts for difference between the two) Carbon spots I'm not aware of anything that will reverse this other than conservation of the coin by a professional and even then you may not get results. Most just say leave it alone. If it's spotting that is early toning by off chance why remove it? If it's MS or valuable many will pay premium if beautiful toning exists.[/QUOTE]</p><p><br /></p>
[QUOTE="dannic113, post: 1413697, member: 35203"]Without pics it's a shot in the dark here but if the spots are black they could be the start of toning but more likely are carbon spots. Something is reacting with the copper used to strengthen the silver. If the spots are green looking mold the plastic that they are stored in may contain PVC and is damaging the coins. PVC damage can be helped with 100% acetone (hardware store not nail polish acetone see other CT posts for difference between the two) Carbon spots I'm not aware of anything that will reverse this other than conservation of the coin by a professional and even then you may not get results. Most just say leave it alone. If it's spotting that is early toning by off chance why remove it? If it's MS or valuable many will pay premium if beautiful toning exists.[/QUOTE]
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