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<p>[QUOTE=&quot;GDJMSP, post: 76724, member: 112&quot;]It could even be the felt - or the glue holding the felt to the wood - or the wood. That&#039;s the thing about coins - almost all materials, except inert ones, put off vapors just from exposure to the air. These vapors cause reactions in metals. Ya never know what it&#039;s gonna be unless you know all of the chemicals in the various materials and how they react with each other and various metals. </p><p><br /></p><p>You are correct that dissimilar metals can react with each other. But typically other things affect metals much more rapidly, and often more severely, than other metals do.[/QUOTE]</p><p><br /></p>

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