The surface is getting, well not the surface, but the image, unfortunate. Part is tinted underpainting, part opaque surface "real paint" Looking at it in real life It almost looks like a rough copy of someone else's painting. I'm not keen on the tinted portions because of this and may repaint the whole thing once it's locked down.Marc, what do you think of getting some contrast in there? That's really the only thing I see that could use improvement.
Part of the contrast issue is just the way it's photographing.