I got this far today before I got to the point where I was using my Mr. Clean Magic Eraser three times in about a 10-minute period. Walk away from the painting, Susan!
There are still many streamlining adjustments to be made around the figure and on the figure, but so far I am pleased with him (the use of the MCME above notwithstanding!). Right now, in looking at the photo and checking the painting again I see that behind his right foot I missed somewhat with the gravel color so it looks like his pant leg falls behind his foot and drags the ground. That is an optical illusion since it doesn't show properly in the photo.
I'll keep on keepin' on, this is still a cool photo!