Lookin cool, some nice progress.
Careful with your metal shader, it's looking a bit too glossy and plastic I think.
Also, I would suggest you ditch the green and yellow mix I don't think it suits him. I really like the green you've chosen though and you could push it through with the rest of the armour and maybe complement it with some darker tones and really subtle warm red tints.
Maybe something along these lines could work:
Keep up the good work