Although Brom probably mentioned as much at the Seattle workshop several years ago, I complete forget what technique he uses to achieve the textures in the backgrounds of many of his paintings. I'm also curious about the substrate he uses. Are they just gessoed masonite panels?
Here are some of the paintings with his textures:
(on the gears)
Any guesses? I guess I could email Brom, but he's probably so busy that he wouldn't respond.