Originally, I envisioned a guy who dealt primarily in munitions, but liked to stand almost within blast range--kinda pyro. I planned to soot him up pretty well, with heavy, front-facing armor. When thinking about weapons, a big launcher just seemed to make the most sense. I know that launchers are supposed to damage the other guy, and I'm trying to resist a "no kidding?" comment. As I mentioned above, powder residue is left from discharging a firearm, and I think I imagined someone who'd blow up absolutely anything he could, fire a rocket launcher at the drop of a hat--anything just to see a flash. I guess I figured that being around that kind of destruction would blacken things, but if darkening of the suit would be negligible, I'll live with it. The scratches on the shoulder and collar pieces are a good idea.