Removing rhodium plating from yellow gold bracelet

Answer 1

There are two safe and relatively easy methods for removing rhodium from silver. The first and best choice utilizes a basic electrochemical technique called "electro-stripping". The rhodium plated silver is carefully submersed in a modified sulfuric acid bath and essentially reversed plated. This process can quickly remove rhodium from all areas on the object including small hard to reach recessed areas. The caveat is that this process relies on attacking a pre-existing under plate, typically nickel to be successful.

For simpler silver objects, rhodium can also be removed the old fashioned way by carefully sanding or polishing the area with a light abrasive until the silver surface is exposed. After the repair has been completed, the silver piece will than need to be refinished and replated with rhodium to complete the process.

Source:
http://www.artisanplating.com/articles/rhodiumcare.html
http://www.b2cjewels.com/education/platinumguide.aspx