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<p>[QUOTE=&quot;GDJMSP, post: 3746988, member: 112&quot;]I don&#039;t know of another way to explain it beyond what physics-fan said, and I said. Cast coins simply have a completely different look from salt water damaged coins. I mean both have a rough and porous looking surface, but there&#039;s different kinds of rough and porous. Corrosion eats downwards into a flat surface, and casting bubbles up against a flat surface - with each resulting in a completely different look/appearance.</p><p><br /></p><p>The only way I know of to learn what that difference looks like is to compare corroded coins to cast coins. As it simply cannot be adequately explained by words, at least not by me.[/QUOTE]</p><p><br /></p>

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