"Now I see what is used to put a patina finish on copper and brass."
Some of the greatest forgers of brass/bronze antiquities have long known that the desired patina can be best achieved by artificially aging the piece(s) in a slurry of cow urine and feces.
7 posted on 06/18/2008 9:27:02 AM PDT by Joe 6-pack
(Que me amat, amet et canem meum)