As always I wanted to keep the colors clean and simple. I try to use colors as a way to magnify composition and storytelling. It's all too easy to get caught in the trap of using color to polish forms. I think that can ultimately be detrimental to overall composition.
Most of the oily smoke in the background was done in Painter using distortion brushes. Those are a personal favorite, and they add energy to an otherwise flat background.
I'm having a ball on these covers, and I think I'll try to push things even more.