Original Artwork.  Done in blue and red pencil on a comic book art board, then scanned into Photoshop. 

Revision - Client didn't like the way Lobos looked.  I did not care for the way Angie came out originally.  I had to redraw those two characters and Photoshop them into the pencil scan.

Finished.

Proof of concept http://www.thisispowerblog.com/