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Making dark copper and bronze coins lighter in color
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<p>[QUOTE="gsimonel, post: 2602589, member: 82549"]If you use anything acidic to lighten the patina, you risk eating away some of the metal along with it. If you want to remove the patina without removing metal, electrolysis is probably the best way to go.</p><p><br /></p><p>Another option is scrubbing it hard with one of those thin green scouring pads from 3M and some dish-washing liquid and water. It will remove the patina down to bare metal, but remove it from all the highest points first, leaving all the raised areas bright and shiny and the lower areas dark. The result is similar to desert patina but much uglier. It's a good way to reveal detail at the expense of winding up with a very unnatural-looking coin. I recommend using this technique only on beat-up LRB junkers that you don't care about, but it does work.[/QUOTE]</p><p><br /></p>
[QUOTE="gsimonel, post: 2602589, member: 82549"]If you use anything acidic to lighten the patina, you risk eating away some of the metal along with it. If you want to remove the patina without removing metal, electrolysis is probably the best way to go. Another option is scrubbing it hard with one of those thin green scouring pads from 3M and some dish-washing liquid and water. It will remove the patina down to bare metal, but remove it from all the highest points first, leaving all the raised areas bright and shiny and the lower areas dark. The result is similar to desert patina but much uglier. It's a good way to reveal detail at the expense of winding up with a very unnatural-looking coin. I recommend using this technique only on beat-up LRB junkers that you don't care about, but it does work.[/QUOTE]
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Making dark copper and bronze coins lighter in color
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