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<p>[QUOTE=&quot;Kevin Mader, post: 7957963, member: 106826&quot;]Maybe less time than you think.&nbsp; Really depends on the conditions around the event.&nbsp; Coins stacked in a drink holder in a hot car accelerate the decay of Zincolns especially.&nbsp; Easy to get those rings in that situation especially if you add a little French fry salt.&nbsp; And stacked coins left around a swimming pool will stain faster too. Witness marks are left behind and tone at a different rate.[/QUOTE]</p><p><br /></p>

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