This is going into an upcoming issue of Hustler. All digital watercolor and a touch of chalk. Fountain pen inking scan. I use different paper textures laying in basic colors and then finish washes. Bristol board first and then French medium grain or cold press. Hot press too, I bounce around to see what looks coolest most times.

"Practice, that's all I can tell you." - Chet Atkins
Dan Collins Cartoons.com