Gray Pastel Portrait

Trying a new technique with portraits. Using 100# Strathmore windpower vellum bristol, a smooth paper, I covered it with gray pastel then rubbed it in for a medium tone. Then I sketched in the darks with the gray and pulled out the lights with a kneaded erasor. then since that was not enough contrast for me I hit some areas with black pastel and put in a couple of hightlights with white pastel. I used a homemade tortillon and paper towel to blend and add pigment dust to areas also. I may work on this portrait some more later as this paper allows me to do a lot of scrubbing and application of pastel.