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<p>[QUOTE=&quot;mrjason71, post: 2907747, member: 90347&quot;]Thank you for all the great advice/information. The product I purchased is that contained in the first link you posted--regular old Coin Care. I definitely messed up; Had no idea this removed tarnish. Just thought it &quot;cleaned&quot; dirt, etc and that if it left a coating I could easily remove with acetone/xylene. I think I was thinking of Blue Ribbon when I purchased this. </p><p><br /></p><p>I&#039;ve been dipping and noticing what I believe to be dirt, etc remaining on the coin after the dip--like the coin is not &quot;spotless&quot;. Ive pre-soaked with DW and acetone, but the coin still has funk on it after dip. Currently have coins soaking in xylene (they have also been in DW and acetone) and Im hoping maybe this will do the trick. If not, I need to figure out something to remove whatever withstands the dip. </p><p><br /></p><p>I guess this is not a common problem? The coins I&#039;m selecting look really clean beforehand--just tarnished. I&#039;m surprised that the coin doesnt looked totally stripped of all foreign substances after the dip but that is my experience. Identifying the &quot;dirt&quot; probably is most important but I dont know how to do that other than trial and error with various substances, chemicals, etc until its gone. I am also theorizing that this dirt is beneath the tarnish. That may very well be chemically impossible--I would think only metal could tarnish and that if there was dirt on surface that that area would be spared oxidation or whatever. Can dirt be beneath tarnish? Maybe its &quot;tougher&quot; tarnish than what&#039;s on the majority of the surface of the coin...Since I am using junk coins I have really left a few in the dip for up to a minute seeing if these &quot;spots&quot; will eventually &quot;dissolve&quot;. (Not carbon spotting--I believe I know what that looks like--this looks like dirt). I will see if I can capture with camera. Hope that wasn&#039;t too convoluted <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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