I agree with the Brasso method. Mom used this for years to clean her silver.
The only addition to this that I have is that my wife had an old electro-sonic jewelry cleaner.
Nothing magical about this device except it has settings to vibrate at 30, 50,80 hertz.
You fill it with your cleaning liquid drop in your ring or such and it comes out looking like new.
You can pick one of these up on Amazon for less than $30
If you are doing jewelry, watch what you use for cleaning solution.
I threw in a pair of gold colored cufflinks I picked up from an estate sale with just some dawn dish liquid. This is what they advertise is gentle enough to remove oil from wildlife. Long story short.... They came out silver colored.
I had to question myself if they were just so tarnished that they looked gold/brass colored or just so cheap that all the coating fell off.