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<p>[QUOTE=&quot;Collect89, post: 473761, member: 15445&quot;]<span style="color: black"><font face="Verdana">Hello jrwill56,</font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">If someone talks over a coin, then little drops of saliva can end up on the coins surface.&nbsp; These tiny drops can react with the metal forming spots.&nbsp; Copper coins are the most reactive &amp; silver to a lesser degree.&nbsp; By the time you see the black spot, the metal surface is probably damaged.</font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">Another common source of spots is the little droplets expelled when a can of soda is opened.</font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">Things like this can show up years later.</font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">Very best regards,</font></span></p><p><span style="color: black"><font face="Verdana">collect89&nbsp; </font></span>[/QUOTE]</p><p><br /></p>

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