I wanted to try one of Richard McKinley's underpainting techniques. I used Pastel Multimedia board and added a quick value drawing with a hard pastel. Then brushed on Liquitex clear Gesso on top to seal the drawing and add more grit. It was difficult to brush on the gesso without completely smearing the drawing. Once I had a layer of the wet gesso on, it was easier to get the gesso more level without disturbing the drawing.
After the gesso dried, I put some transparent watercolor. I should have used more pigment as it dried pretty light.