Curated with aloha by
Ted Mooney, P.E. RET
The authoritative public forum
for Metal Finishing 1989-2025
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Restoring a proof coin to original finish
Is there any way to restore a Proof coin to its original mirror finish. I've a Bahamas proof 10 Dollar coin which had become tarnished inside the plastic container. I thought I would be smart and try to clean it using a Cotton Bud and very fine car polish called 'Mer'. All I succeeded in doing (you've probably guessed by now!) was putting very fine scratches on the surface of the mirror surface. Can anyone help me?
Thanx
Ronnie ScottHobbyist (Coin Collector) - Paisley, Renfrewshire, Scotland United Kingdom
2004
Try citric acid ⇦ this on eBay or Amazon [affil links] (5%)-if coin is copper or copper alloy(ammonium citrate solution is better/ph9/ )Rinse well and dry it with pure alcohol or acetone ⇦ this on eBay or Amazon [affil links] Warning! highly Flammable! . If your coin is silver you can use sodium thiosulphate ⇦ this on eBay or Amazon [affil links] solution (30%)!
Goran Budija- Cerovski vrh Croatia
2004
It's a silver half dollar and it was plated for a brooch. I would like to get to the original coin again if possible. please help.
Mark Rokesconsumer - Port Charlotte, FL, U.S.A.
2006
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