Steve,
Sounds sinister. Would you really paint the coco bolo black? It's such a beautiful wood in it's natural state. On the other hand, even if you do paint it, you'll still have the sound of coco bolo. Take my word for it, when Alembic describes the sound as complex, it is exactly that. Black would fit the mood of the coco bolo sound, but darn it, I'd still wanna see that grain.
Peace,
James