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<p>[QUOTE=&quot;Tamaracian, post: 8154513, member: 23122&quot;][USER=133514]@Newbee03[/USER]&nbsp; IMO your coin is <i>not</i> one that has been recently cleaned, rather it is a coin that had been used in commerce for many years (hence the smooth, even wear) and as such has picked up dirt, grit, and metallic particles which mix with fingerprint oils and other oily contaminants (e.g. food residue) and are deposited around and within the protected areas of the Relief, which over time oxidize, harden, and build up into the blackish deposits that you describe.</p><p><br /></p><p>While it is possible to remove this residue as other members have pointed out, it has been my experience that mechanical action in conjunction with a suitable solvent would be needed, followed by a complete washing with clean water (best to use distilled water for the final rinse).&nbsp; If one is available to you, the use of an ultrasonic apparatus with a suitable solvent would be an efficient method to use.</p><p><br /></p><p>NOTE:&nbsp; if you are successful in removing the residue, you will find the that color and surface underneath the residue will be different and fresher than the areas that were not covered (usually lighter and shinier), therefore, <b>it would be apparent that your coin would look like it had been cleaned in those areas</b>.[/QUOTE]</p><p><br /></p>

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