A great all purpose alumina polish.
Use approximately 2 tablespoons for a pound of rock in a rotary, and 1.5 tablespoons in total for a 4 pound vibratory tumbler.
For best results in a rotary tumbler, we suggest adding a small amount of Ivory soap (1/2" cube or a couple tablespoons of grated flakes) in along with the polish to help get the best shine.