I can't help but think the hair and eyebrow are letting this bust down, he's battle damaged yet other than the chunk of hair that is missing on the one side it looks like he's walked out of a hair salon not a battle ? it would also add more realism if you could cover the wig hairline up with some glued hair and give it a little shape, also on the damaged side on the right forhead
I also think the eyebrow placement isn't helping the with the frown expersssion on his face as it too thin and angle seems off
darkening the skin and adding more layers of paint will really add depth to it and bring it to life
nice chrome finish again though that works great on this bust, what is it your using ? I'll have to try it out on mine