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<p>[QUOTE=&quot;Kentucky, post: 2909688, member: 33176&quot;]Clean... conservation of any and all coins involves three steps 1) pretreatment 2) treatment and 3) post-treatment.&nbsp; The pretreatment is a step where the surface is made free of contaminants that the treatment will not remove...i.e. if a coin that has some organic residue is dipped in eZest, the eZest will not affect the area that is coated with organic residue.&nbsp; The treatment can be any of a variety of methods.&nbsp; The post-treatment is what will prevent or minimize further modification of the surface...the treatment chemicals should be removed/neutralized to the extent possible, and then the fresh, clean surface should be passivated and protected.&nbsp; One of the protections is to get the coin into some kind of a holder that will minimize the exposure to environmental factors.[/QUOTE]</p><p><br /></p>

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