I love the trailing efeect that you put in there, and the fact that he looks more alien, than he is typically depicted. Most of the time he just looks like an almost naked chrome human, whether you did it intentionally or by accident, his human for is not so human looking.
Very well done here. Work looks good. Nice post work as well, I agree. The only thing I would have to say is that The head of Silver looks a litte mis shaped to me. But again this could just be me? But still very, very well done and cool. :)