I wish they were stainless steel but
Gear link rod --------steel with som sort of paint coating
Gear arm --------steel with som sort of paint coating
Front pegs---------- alloy
I took it off and I have a bench grinder with a set of polishing mops which is the only way to get the gear leaver like this.
Then a coat of clear laquer
Pegs you can do with any metal polish autosol/brasso and can do by hand