I finally had to face the fact that no matter what I did to try to fix my Sam drawing, I still didn't like it. Even the satisfaction with the last tweaking faded after a few days. I realized that the only way to make it work would be to redraw the body.
I think the problem in general was that this original pose just didn't seem natural. The figure's left shoulder was too high and looked contorted and I could never figure out where to position the right shoulder. Also his left shoulder looked too big, but whenever I tried to scale it down, it would throw everything out of whack.
Before getting to my latest version, I tried lowering the shoulder lines, lengthening them out, I made his chest larger, made it smaller, I redrew his arm and hand, I tried obscuring his whole right shoulder in the shadows, but it just never worked.
I was really ready to throw everything out the window, but I figured I could give it one more go, so I erased his body and started again. I wasn't sure that the paper would take this, but I figured I had nothing to lose.
I searched my reference images for a compatible body pose and I found one that I thought could work. It even had a similar light source, so this is what the new drawing looked like.
The color is off in the photo, but you can see where the paper was stained by the previous color pencil application. In this photo I have also already done a lot of new background work on the right.
The blotchy areas in the backgound are actually shiny spots causing reflections in the picture. All my brushing and layers of color have pretty much killed the tooth of the paper in these areas. If I can get this finished, hopefully spraying on a fixative will help to even up the surface at the end.
This last progress shot shows that I have been able to cover up the stained areas and I'm finally proceeding to final coloring and shadows. I'm not sure how this will end up, but I like it again. And I have learned some good lessons :-)