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<p>[QUOTE=&quot;Clawcoins, post: 3704821, member: 77814&quot;]be wary of old pennies in resold rolls that are nice and shiny.</p><p><br /></p><p>Ever see those commercials of someone selling some liquid that immediately makes copper pans nice and shiny with one single wipe?&nbsp;&nbsp; Yeah, they use that stuff on pennies too.&nbsp; </p><p><br /></p><p>Vinegar/salt does the same thing to remove copper oxide.&nbsp; Here&#039;s a nice, quick read about it.</p><p><a href="https://sciencebob.com/clean-pennies-with-vinegar/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://sciencebob.com/clean-pennies-with-vinegar/" rel="nofollow">https://sciencebob.com/clean-pennies-with-vinegar/</a>[/QUOTE]</p><p><br /></p>

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