JTairbrush
Gravity Guru
Yo, Mitch, if you don't mind me jumping in, I would like to throw in my two cents. B/W portraits are different, JT. instead of doing the white on black, I erase for texture and let the white of the substrate show.
That's how I've been creating my textures and highlights so far and it works very nicely. When Mitch showed his technique, I thought it would be better for work on cars and bikes, which you can have a more difficult time using scratching and erasing and many times you are not working on a white surface when you airbrush cars and bikes. Also, its quite common to paint monochromatic subjects on vehicles, so I was trying to figure a method of counter acting the dreaded blue shift using Mitch's method. Thanks for the suggestion.