Known by the names nickel silver, white brass, Maillechort, German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum it's a copper alloy with nickel and often zinc. Sooooo any of those products will "polish" it but to work fine scratches out of it, you need a very fine abrasive such as the 3M Micron Polishing Paper I recommended. Work your way down from the coarsest to the finest of course, use it wet or dry. Or, if you have the appropriate buffing wheels, buffing mediums and skills, that's another way to go.
Forged on the anvil of discipline.
The Few. The Proud.
This country has become more about sub-groups than about it's unity as a nation.
"The #72 pattern has got to be pretty close to the perfect knife."
--T.J. Murphy 2012