This was just a little exercise to see if what I had in my head, would work.
I took a cheap 125mm x 175mm (5″ x 7″) piece of Tru-card board and traced the image on it. I then filled the solid parts with Molotow paint markers. Staying just short of the edges in order to give it a softer edge with the airbrush.
I used E’tac’s Payne’s Grey to do the rest. Erasers and blades were used for the highlights and textures.