In my bowl turning, one of my favorite finishes is Formby's Tung Oil Finish. My usual process is to give the finished bowl two coats. I follow this with a sanding/polishing step and add another coat of finish. I then repeat this one more time.
My question is this. I have a couple of items available for the between-finish sanding. I can use OOOO Liburon steel wool, white polymeric sanding pads or P400 or 600 wet or dry paper. Which of these would one use for the sanding prior to the final finish or after the final finish but prior to giving the surface a coating of paste wax followed by buffing?