It depends on what I want to achieve. I only use my JOOLTOOL on fired/sintered and brass brushed silver clay and have two back pads, one with a cushion for curved pieces or areas and one without for flat pieces/areas. Since I always spend the time and effort to pre-finish my metal clay pieces in the greenware state before firing them, I usually don’t need to do a lot of finishing work after firing.
If despite my pre-finishing work, a piece needs to be sanded, I’ll use the 3M Trizact sanding abrasives.
For a high-shine finish, I use the green 1-micron 3M radial bristle brush, followed by the felt wheel with the JOOLTOOL polishing compound and then a clean buffing wheel.
If I want a more matte or satin finish, I would use a 3M Scrubby texturing Wheel or a blue (400-grit) 3M radial bristle brush, respectively.
There are two other types of abrasives that can come in handy. If I discover a very shallow scratch or divot on a fired piece that the Trizact sanding discs won’t remove easily, I might try to smooth that area very lightly with the fine and very fine 3M Scratch Eraser discs, rather than filling the shallow depression with clay and re-firing the piece. And if I decide to grind off an area on a silver piece for some reason, I use the 120- and 220-grit purple ceramic grinding discs.
I hope that’s helpful.