...If you want a grittier looking robot, however, this step's for you. A lot of what I did here was just outline the panels with some indication of reflections. There are additional details on the eyes, knuckles, tire treads, headlights, and in between the armor plates of the chest and beneath the chin. Most of the rest is just dust and scratches, with some mud splatters and whatnot on the feet. Now Bulkhead looks like he's seen some combat.