This is really great! The mail looks like real metal, while the skin tones and scarring are well-suited to an older veteran. I also think the lips are a bit too red. I've nearly finished my version and I concur with Blue Thunder that the beard could have better sculpted. In this scale it lacks some finesse. I tried to do it with paint, but I don't think I pulled it off.
Again, well done, and I'm looking forward to seeing the finished piece!
Cheers,
Glen