I can't really say much about your repaint as the pictures aren't that clear enough to see the details properly :/
Thought from what i can tell, I think you went abit too overboard with the silver on his armour though from what i can see its just abit too clean for my liking. It needs some weathering In there! Hes an elder, hes old and worn down! Keep it that darker colour for the armour its more accurate to the screen used costume.
Its funny, that picture of the elder clearly shows the skull on the sword sheath, and the side hip pouch on his left side. The other photo Ive seen where he first walks out and has the tri laser pointed at Danny Glover, there is no hip pouch, and the skull is not on the sword sheath, but where NECA put it.