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<p>[QUOTE=&quot;-jeffB, post: 6901437, member: 27832&quot;]I found it wasn&#039;t necessary. Throwing in salt will accelerate things, too, but makes it a lot easier to trash the coins. I prefer the slow action of plain white vinegar.</p><p><br /></p><p>Edit: I think someone here found that vinegar plus peroxide would etch <i>silver</i>, and seemed to restore dates on dateless SLQs. He thought he&#039;d found a 1923-S that way, but when he submitted it to ICG, they wouldn&#039;t slab it even as a details coin.[/QUOTE]</p><p><br /></p>

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