Dmezhkov Aug 25, 2016 29 12 Dec 14, 2016 #1 My old copper coins, which some are almost black, will discolor from the sweat of my hand, ruining that beautiful age. Is there any ideas on how to prevent this, or to artificially create the dark color in old copper?
My old copper coins, which some are almost black, will discolor from the sweat of my hand, ruining that beautiful age. Is there any ideas on how to prevent this, or to artificially create the dark color in old copper?
L Levent Suberk Mar 6, 2015 217 59 Dec 16, 2016 #2 Copper coins can be sprayed with clear varnish to prevent them from discoloring within time. Firstly clean with metal polish.
Copper coins can be sprayed with clear varnish to prevent them from discoloring within time. Firstly clean with metal polish.
