I experimented a little tonight while Zoom sketching with the Fresno group. I have been using masking fluid or resist as a way of keeping parts of the black paper really black. Tonight’s model wore stripes, and presented me the opportunity to use this new technique.
I drew with it by squeezing it out of a bottle, and by applying it more thickly with a brush. After it dried, and after I painted the picture, I rubbed it off, along with any paint that was painted over it, and black line was revealed on the page. If you look you can see it all through the sketch.
I am going to keep working with it awhile and see what I can do with this technique.