Choosing a method to polish and buff a finished clay work is a personal thing. What works for one person doesn't always work for another. That is due to the need to try and practice the technique in play.
Using a Dremel can be your first step into using power to polish. Having the right heads makes things easier. This buffer head is the last step to getting a shine. It comes after sanding.
So a quality buffing wheel makes the difference.
Stoddard brand made in the UK and Switzerland are 24mm across with a 1/16" shaft width. Fits any dremel or foredom rotary tool.