Rob Bottin built out Weller's face a bit to join up to the mechanical portion of the head. That makeup didn't always move along with Weller. Look at Murphy's face in the very last shot of the film
Amazing so far! I was going to suggest some more flesh tones for the unmasked face, but perhaps its the right amount of pasty. Certainly looks great when the helmet is on. Would love to see one of these fitted with a voice chip for random quotes.