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<p>[QUOTE=&quot;mattpetro, post: 600868, member: 18878&quot;]Hello all...</p><p>I am not a collector, but a tile contractor from New Jersey. I have a request from a customer to install a powder room floor consisting of pennies she has supplied varying in dates from 1940&quot;s to present. Most are quite soiled from use in circulation. We&#039;d like to clean them all so they&#039;re as shiny as possible. Then I plan on setting them and coating the entire floor with a thick epoxy (perhaps up to 3/4&quot; to 1&quot; thick) such as seen in bar tops. I plan to use a cement based black grout between all the pennies.</p><p><br /></p><p>How can I best achieve a shiny, clean result? I have about 7000 pennies to clean. Is there a solution I can submerse them all in? </p><p>Will contact with portland cement based grout (alkaline) affect them? Once coated with the epoxy, they will not be in contact with any air, so will that protect them from oxidizing?</p><p><br /></p><p>I know very little about coins or how different metals will react to different building materials. I would greatly appreciate any advice you all could give me.</p><p><br /></p><p>In light of recent economic events, who knows? This may be the best way to save our pennies![/QUOTE]</p><p><br /></p>

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