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<p>[QUOTE=&quot;calcol, post: 3026581, member: 77639&quot;]I&#039;d degrease the coins with acetone as a starter.&nbsp; It&#039;s safe for all metal coins.&nbsp; Search for acetone in the forums; you&#039;ll find lots of info.&nbsp; I won&#039;t repeat any of it except to mention that acetone and its vapor are very flammable.&nbsp; Start small and take appropriate precautions.</p><p><br /></p><p>You find that a lot of the dirt and grime comes off with the &quot;grease.&quot;&nbsp; Once they are degreased, other conservation methods can be considered.</p><p><br /></p><p>Cal[/QUOTE]</p><p><br /></p>

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