Weird Al

Charcoal on 9x12 toned grey paper.

Jimmie

Jimmie Vaughan. Charcoal in toned paper. 9x12". 

...to this:

From a rough study like below.

Andy

An old pencil work on a smooth bristol vellum. Lately, I learned that smooth paper, either vellum, newsprint, or any kind of smooth paper works best on graphite and charcoal.