Hmmm. I was going to go with a metal surface, but then I thought a guy who produces lightning from his body would probably not have anything metal on him. Did you notice the yellow bolts on the sides of the boots? They are modeled in, so maybe the outline on the top would be redundant. I will come up with something cool.

The only post work on that render is the lightning... 

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.