I do them all the time with a table top. Using the method Ryderz described abv. constantly rotating with light even pressure. It doesn't take much time but maybe a little more with the steel sleeve. Not sure how it will work with different materials could get tricky. I generally check the progress 3 to 4 times while taking them down to within .15 to .2mm of the target with the belt, then finish on the disc holding the jug center on the disc makes a beautiful final finish.