Turn signal arm, what kind of metal is it?

[Stike]

I have my turn signal switch dismantled to clean the contacts. I wound up removing some paint from the arm while cleaning it and thought it would look good polished ( I think I saw that 240Z Upgrades does this? ) but I'll just repaint if it will wind up rusting. 

[7tooZ]

You could clear coat it or use shark hide


Don's iPhone using Classic Zcar Club mobile

[Mark Maras]

 I've seen them rust. There has to be some iron in them.

[siteunseen]

I've seen them pitted with rust too. Try a magnet and you'll know.