Reply To: Beginner question › Forums › Polishing › Beginner question › Reply To: Beginner question March 1, 2019 at 9:29 pm #5338 Rick_BrookerParticipant @Rick_Brooker If you want to use the aluminum master lap for final polish, you can use a dynalap. They come in many different grits, the blue spectra lap is popular for that. The downside is that it can cause rounded edges on the facets.