After having my beads tumble in the tumbler for 8 hours, using 400 grit wet/dry sandpaper, I changed them over to the other barrel.  This time I am using 800 grit wet/dry sandpaper.  I found the finer grits at an auto supply store.  I checked all of the beads before I closed the barrel.  They where glossier and also smoother and none of them damaged.  I am re-using the sandpaper in the first barrel to work on other beads.  I am trying not to mix light and dark colored beads together.  I have heard of them becoming discolored.  In the second batch I started, I also added three barrettes that where made with the same cane as the beads.  I will see how that works out.  I will check both barrels after four hours and check on the beads inside.  I think that I will allow the tumbler to run all night.  It is very quiet and won’t keep any one up with the noise.