Rhodium Plating Over Unknown Metals: Smart, Cautious Guide

Summary for rhodium plating over unknown metals Discussion

Rhodium plating over unknown jewelry metals is possible in theory, but the thread warns that it is usually not a simple direct finish for costume pieces. Katherine El Toboso asks whether vintage costume jewelry with unknown substrates such as copper or brass can be rhodium replated to create a brighter silver-white bridal look. The reply says the main problem is that rhodium is typically applied very thinly because it is expensive and technically difficult to plate with, especially on stressed and brittle metal. The answerer advises that a durable, inexpensive rhodium finish is unlikely directly on a non-white base metal. Instead, the piece should first be plated with a white intermediate metal such as silver, white bronze, or nickel. The reply also notes that nickel can be problematic because of common allergies and export restrictions to Europe.