In a message dated 12/25/06 2:03:06 PM, johnb@oxford.net writes:
>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.
Nope. The metal is polished then copper is used to fill any inperfections in the metal, then polished then plated with nickel then polished then chrome. Labor intensive. Phil Brown Had a great plater but not in San Rafael, Calif.