If you google metal refinishers, about a ton of shops come up in the L.A. area alone. There's so much industry in SoCal that there has to be some reputable shop that can do it.
Also consider any decent jeweler. If not, they should be able to recommend someone locally.
All the best,
Nonoise
Also consider any decent jeweler. If not, they should be able to recommend someone locally.
All the best,
Nonoise