Hi Craig,
I agree that Olivewood turns nicely. It can be a little temperamental to finish with CA. If you use another finish you will likely be fine.
Cocabola turns nicely and is an oily wood, like olivewood, so it might have the same issues with a CA finish. Also, be aware, that it seems to be somewhat common for woodworkers to have allergic/rash issues with cocabola. If not at first, the reaction can develoep after repeated exposures. So, make sure you take some precautions from the chips and dust.
Oh - and I am not saying they these 2 woods can't be finished with CA, just that it might take some practice.
Some nicely figured walnut can look really nice, and turn pretty well.
Dave