Cleaning my trem
if you have a bit of time:
disassemble the trem in every piece which it's built with, even, and especially the two parts of each saddle, the little pivot that keeps them together as well.
then give the saddles and the rusty parts a little sand, to get the rust off.
then dip the whole bunch of pieces in a naphtha solution and let it the whole night.
the day after keep the parts off the solution, give them a good wipe with a rag, and dip them in a acetone solution, and let it a few hours, or another night.
after all, give them a good wipe and reassemble.
if the ex-rusty parts are showing too much steel off, give them a thin coat of sprayed nitro.
that's my method, it works.