Any tips on how to restore old transformers?

I just bought a complete vintage Devastator and want to do a bit of restoration on it. It is used, but in decent shape, although I am going to buy a replacement Hook (broken leg). I want to replace the stickers, tighten the joints, and redo all the chrome. Can anyone suggest best practices for redoing the chrome and tightening the joints? Also, I think I would like to add something to the wheels to prevent squeaking.