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<p>[QUOTE=&quot;desertgem, post: 1493434, member: 15199&quot;]There is no need to use heat with acetone, as its purpose with coins is to dissolve organic material and an increase in time will do as well as an increase in temperature. It can not repair or restore any previous condition to the metal, nothing really can bring it back to what it was before. Hexane, even in a lab should be used with great care. Old time stamp collectors and &quot;paper&quot; collectors used hexane to determine watermarks, although it is only drops, and Ronson type lighter fluid ( naptha) is easier to buy and as effective, as neither damage the paper. Chloroform should be limited to the few organic syntheses that require it and only in a controlled lab situation. </p><p><br /></p><p>Look up Verdi-Care ( BadThad ) also as it has a different composition than products like Blue Ribbon and MS-70. IMO.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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