Victor tone arm: dirty or loss of plating?

[mick_vt]

I believe Victor applied shellac to the nickel plate. Soaking parts in ammonia overnight should dissolve the shellac and save a lot of work.
_bill

I believe this is true of the gold, but not the nickel... that it was laquered over the plating

[Curt A]

Here is an interesting reference detailing various solvents and their uses: https://www.popularwoodworking.com/arti ... _solvents/