I've just bought a tea pot charm which only came in antique silver and idealy I wanted a nice shiny silver, so i'm going to give your tip a try! horay for google search.
I really needed to know this and searched for a looonnng time to find the answer.
I have spent hours trying to find bright silver cord ends that are the right size, only to find what I need only in antique silver. Now I know I can change them into what I need. It will save me a lot of search time. Thank you so much!