I bought unfinished cocobolo stocks and was advised, that with such an oily woods, to wipe them several times with acetone before using a fast drying sealant such as CA glue, which I used (to do it over, I would probably use CA in a spray instead of wiping/brushing on). Lightly sanding between coats lets you choose your finish.

Also, these woods can be a sensitizer, so I wore a mask and nitrile gloves when sanding and handling.

Good luck!