This looks great! Love the colors and modeling of forms which create depth on his face. For this study did you print off a light version of your old sketch and paint/draw over that or did you trace your old sketch and build off of the trace or maybe something else entirely?
Thanks Mike. I print the sketch directly on to the paper with an Epson printer. I used to spend hours tracing the sketch on a light box. The Epson has been a big time saver.