This looks awesome.
Firstly, whole helmet would be dyable, I really imagine it look cool in black or dark red or.... pink
Secondly, regarding "steampunk it up" thing you can just add a bunch of stuff like this:
Maybe not the cogs but basically some scars and screws, perhaps something to make it look like it's partially made from random (s)crap
You can also just add the googles on the helmet
Imagine how cool you'd look with one pair of googles on your helmet and other on your eyes
Or one pair of googles on your helmet and some other "googles" on (like cigarette or moustache, which take up the google spot).