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<p>[QUOTE=&quot;Packrat, post: 3354424, member: 71780&quot;]A friend told me 2 parts vinegar, 1 part hydrogen peroxide for 24 hours. A stronger peroxide would be quicker. I have not tried it yet.</p><p><br /></p><p>In the 60&#039;s I used Nic-A-Silver. It is no longer produced and no one in the coin supply business remembers it. It had limited effectiveness. Best luck was bringing up the date on a three cent silver piece or bringing out the mint mark on a Mercury dime. Changing a 1921 P to a 1921 D was beneficial, but I could never get a D to show up on a 1916 dime. It did not &quot;etch&quot; the metal like Nic-A-Date does on buffaloes. But it would stain your hands purple to black if you touched the chemical and you just had to let it wear off.[/QUOTE]</p><p><br /></p>

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