Actually, you can purchase a fairly inexpensive gadget called a “pen plater” that works pretty well to electrolytically plate small metal parts, such as faucets. I have a pen plater made by Pepetools that cost less than $100 about 5 years ago, and I have used it to gold, silver, and rhodium plate small parts. Takes a bit of practice and patience, but it works great. The main expense is the plating solutions, which can cost up to $20 an ounce. You can have your faucets professionally plated for about $100. Buying the pen plating outfit and various soltuins will set you back a couple of hundred bucks. It would be worthwhile if you plan to do a lot of fixture refinishing or want to experiment with a new hobby, otherwise it would be more economical to take your fixture to a plating jobber.
NtP