I'm still playing around with oil pastel to see what I can get it to do. I'd really like to get it to look like regular oil paints. (I should probably give up and just use oils, but I don't like the smell.) It's painted on tinted watercolor paper with a coat of Art Spectrum Colourfix primer, clear. I think if I used a smoother paper it would look more like an oil painting, but I sort of like the effect of the texture of the paper that shows through in the background. I might enter this in the Color Challenge of Daily Paintworks if I can figure out if it qualifies for one of the color schemes. That was the original intent when I started, but where is brown on the color wheel?