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<p>[QUOTE="desertgem, post: 501025, member: 15199"]I think that Thads Verdigone is an excellent addition to conservation ( which I consider it) <b>when it is used as directed .</b> However neither it or acetone can <b>repair</b> the damage done and lurking beneath the surface gunk. Acetone is realtively cheap at Wal Mart and can dissolve most organic ( non annealed ) deposits. Verdigone will slowly and gradually remove most copper corrosion products, but not organic or annealed organic "carbon spots". It is much more expensive due to its composition. The Man 12 might spend more on chemicals for the coin ( 1880 VF Numismedia $9) and still have an ugly corroded coin than buying a better appearing one. Carbon spots are still here to stay.</p><p><br /></p><p> If it was a more expensive coin or a lesser damaged one, that would be OK to try, but Verdigone solution is limited chemically by the amount of corrosion products it can remove and multiple changes of solution would be required to get a near end point and it is almost a certainty that there is serious damage beneath that green gunk.</p><p><br /></p><p>Put it aside and buy a nice one IMO.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>
[QUOTE="desertgem, post: 501025, member: 15199"]I think that Thads Verdigone is an excellent addition to conservation ( which I consider it) [B]when it is used as directed .[/B] However neither it or acetone can [B]repair[/B] the damage done and lurking beneath the surface gunk. Acetone is realtively cheap at Wal Mart and can dissolve most organic ( non annealed ) deposits. Verdigone will slowly and gradually remove most copper corrosion products, but not organic or annealed organic "carbon spots". It is much more expensive due to its composition. The Man 12 might spend more on chemicals for the coin ( 1880 VF Numismedia $9) and still have an ugly corroded coin than buying a better appearing one. Carbon spots are still here to stay. If it was a more expensive coin or a lesser damaged one, that would be OK to try, but Verdigone solution is limited chemically by the amount of corrosion products it can remove and multiple changes of solution would be required to get a near end point and it is almost a certainty that there is serious damage beneath that green gunk. Put it aside and buy a nice one IMO. Jim[/QUOTE]
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