I just sanded my salad bowl down to bare wood. Over time the KL's give it a nice patina.
Food safety inspectors might not approve. I say, just hang your salad bowl from a string under the eaves of your house when not in use. For even more hygiene, bury your bilos in wet sand. Use fresh empty tins of tinfish or corned beef every time you dig out the bilos, so you have something clean to balance them on.