Here's the final background I came up with. I recolored it a bit to make it seem colder and less like a tattooine door panel. I added a few special effects by using the "color burn" tool at a smal painprush setting and created the oil drivulets and burn marks on the metal. I then made a new layer and filled it with a radial gradient from white to black and changed the layers blending mode to "Overlay" and reduced the opacity a bit.
(I know this could have been done with render lighting effects...but I was in a hurry)

Now all I'd have to do is drop in one of my colored character pics and voila. Instant Shirow Styled Pin-up

Let me know if this was helpful. I can start putting together a series on creating textures and displacement maps.