Oil finish bodies. From the link that Keavin posted:
Oil Finishes
Brown Basses, early Series I and II guitars and basses
You shouldn't need to reoil the body, as we use a polymerized oil finish. However, you may want to wax it from time to time. We supply with a buffed wax coating of Liberon Professionals Paste Wax. The 500g tub should last you most of your life. We use a white (very fine) scotch brite to apply.
The wax will endure the little scratches, which you can buff out when you rewax. The wood is not as protected as with a hard polyester finish, so you need to be careful of course.