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<p>[QUOTE=&quot;Conder101, post: 477310, member: 66&quot;]But they are talking about patches, not covering the entire die, and on BOTH dies?&nbsp; Plus I think you will find they are discussing rust on dies from the early 19th century, not moderns.&nbsp; No this is not rust this is a corroded coin from either a strong acid or base.</p><p><br /></p><p><br /></p><p>If you leave it in the acid long enough sure, but have you ever tried to use acd to eat through the coppernickel layer of a clad coin?&nbsp; I have and even with a concentrated acid and replenishing the acid when the reaction slows it still takes awhile.[/QUOTE]</p><p><br /></p>

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