Hi Kathy, depending on how much surface needs to be removed, sand
the MOP disc by hand with 400 grit silicon carbide paper, followed
by 600 grit or just the 600 grit. Polish lightly on the polishing
wheel first with tripoli, then rouge (Dialux White may be better).
Mother of pearl will polish similar to the polishing of silver
except that the polishing motor must be used lightly so as to not
generate too much heat.