Thanks, Jeff
I'm going to refer you to this thread
http://forum.portraitartist.com/show...threadid=1613, where I give a description of sauce. My friend and fellow artist Mari DeRuntz calls sauce, "What charcoal aspires to be."
Denise's portrait is powdered sauce in the face and hands in the light, and a sauce wash on the face in the shadow, eyes, mouth, hair and clothing. I think I was going to just do dry sauce on the background, but ended up using a sauce wash there as well.
It's complicated stuff, I don't know of anything else like it...
Peggy