At 09:32 PM 12/25/06 -0000, Norris Lockley wrote:
>For whatever reason, and I can't think of one, I had far more luck with
>nickel-plated finishes, protected with lacquer coats. The lacquer seemed
>to stick more firmly to that metal than to either copper or brass.
A plating expert could probably elaborate on this, but one reason for plating different layers of metals is to prevent what is underneath from migrating through to the surface. It may be that the iron comes through the copper causing discoloration.
John Betmanis
Woodstock, Ontario
Canada