There are three cotton buffing pads and various buffing compounds (emery red to fine white). I wouldn't mess with the coarser grits. Start with the fine white.
Here is the wheel all hooked up. You have to seriously crank it down with a screwdriver, and even then, it still wants to come flying apart. It did that one time on me, and I put my first dent in the front of the body. Ouch.
Here is what 10 minutes of buffing looks like. Another problem I had is that I melted the finish in the cursed horn trying to get the buffing wheel in there. Dang. Anyway, basically a glassy smooth finish:
