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<p>[QUOTE=&quot;desertgem, post: 911354, member: 15199&quot;]That thread is somewhat out of date as Thad has made several improvements in his formulation leading to his new Verdi-Care product, which is rather like a combination of Verdi-gone and a Blue Ribbon type of solution except it is water based rather than oil based. I use it and have not had any bad effects due to the chemical and like the end result. You must remember that there is a good chance the area under the verdigris has changed ( color, texture, pitting, etc.) and that removing the verdigris may make that area appear different than the surrounding areas.</p><p><br /></p><p>Also some verdigris is just too massive to remove this way or anyway without significant damage to the coin. After using it for a while, you can begin to recognize a coin you can improve versus one which will remain a bad problem.</p><p><br /></p><p>I do know what you are talking about with IHC varieties and the gunk ( organic) that obscures their discovery. Often the gunk is so thick and hardened, that a physical method must be used, such as a soft brush used while the surface of the coin is covered with water, acetone, Verdicare, etc). This will usually be noticeable as cleaning, not necessarily from marks, but from the clear spaces that are not appropriate for the wear on the coin, etc.). Only do as much as needed to evaluate the variety. IMO. Your mileage may vary.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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