[Mike McCarty]

Richard,

I don't think this would work for me. My oil painting method requires many layers of paint. At the end of each session I smooth the days work with a fan brush. Toward the end, when I am confident in my drawing, I begin not to smooth. Each layer is essential to the final outcome. If I had to dig through these layers looking for a drawing all would be lost.

I can, using the method I described above, quickly verify the critical points, right on top of my work.

I can also, by skewing the math, elongate or otherwise caricature the subject.