Only with fingers and not a pick. when playing with a flatpick the rule of thumb says downbeats (1,2,3,4) get a downstroke and the upbeats (the &s) use an upstroke. Does anyone think the same way with your fingers on bass (I am coming back to bass after many years away). Lets say your index would play only the downbeats and the middle would play only the upbeats (or vice versa?). In the past I always just pulled the string with whatever finger was there but I am wondering if a little more disciplined approach might help my timing be a little more consistant. I guess I should finish by saying that I know this wouldn't be practical in all situations but a good rule of thumb to start with.