These are mostly on canvas, and are hand spray painted using multiple levels of stencil. I usually start with a source image, or create one using collage techniques, then digitally manipulate it to separate the colors. Then comes a lot of going in by hand to make small changes so it works as a stencil. Finally, I cut the stencils (as many as 6 or 8 for a single image), and spray paint each layer one at a time.
Oh, yeah- They’re for sale, too.