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<p>[QUOTE=&quot;GDJMSP, post: 1272264, member: 112&quot;]I have to disagree Guy, it is absolutely corrosion. Any form of oxidation is corrosion. Yes, it will form an outer protective layer for the underlying metal. But at the sacrifice of the top surface of the metal, that metal is literally eaten away - it is oxidized.</p><p><br /></p><p>And any coin, or other metal, if allowed to continue to oxidize, or tone, will be pitted eventually. That is why it is so important to store them properly so that you can slow down that oxidation as much as possible.[/QUOTE]</p><p><br /></p>

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