It's done!! IT'S DONE!!!
I actually had completed "Stumpy's" paint job before the holiday madness, but I only now got around to photographing and editing photos of him.
Tree bark is, quite possibly, more frustrating to paint than it is to sculpt. Trees are an odd sort of non-colour, not quite brown, or grey, or tan, and old tree stumps have all sorts of patches of greens and browns and blacks from the various things growing on them. After some excessive cursing and perhaps more layers of paint than I care to admit, I think I got something close.
Now that my Stump Tortoise is finished, it is ONWARD to more sculpting madness!