My first choice for a fingerboard wood is snakewood, (on the custom the luthier is selecting the stock for now). Snakewood is an oily wood that shrinks quite a bit as the stock is dried. It looks like this as raw lumber - It's been a long time since I've owned anything with other than a finished maple or ebony fingerboard. Do you think, or do you know if, a naturally oily wood, (another one is Indian rosewood), will gunk up the strings sooner than other woods? Responses based on expertise or just speculation are welcome.