On the SCAD Fashion Department Blog I found this post about a Professor at Otis who posts Youtube videos about how to render different types of fabrics, hair, sheens, etc on the croquis girls. So cool! And so very helpful. Makenzye and I spent hours trying to figure out how to use markers last quarter all over youtube and I definitely stumbled across this one. What else? Try searching for anime marker drawings... I'm telling you, it helps.
Have a look at Kathryn Hagen's work for yourself here