How can I polish or renew gold/brass plating?

Question

I have a guitar with what is described as "Gold Die-Cast" tuning heads. They are looking very tarnished so I used some silvo on the back out of one in an out of view area and it changed from gold into a silver colour. I understand silvo is just a polish and doesnt actually contain any silver in it, so Im guessing these "Gold" tuning heads are plated gold. Is there a way to polish a tarnished gold/brass looking plated metal without removing the plating on the rest of the tuning heads?

Also, I dont suppose there is a way anybody knows of where I can reapply a brass/gold colour to the part of the tuning head that now looks silver?

Answer 1

you can polish gold with jewellers rouge. If you have gold plated items (most likely)  they can be replated simply- but ask at your local jewellers about replating. You can also "do it yourself-"  but first obtain technical details.

Answer 2

For brass you can also use a product called "brasso"

Answer 3

Take a lemon cut it then use it U will see its shining the n wash it off with some soapy water see where soap can be used