was done by hand. So I blasted it to get a uniform finish. I then started with 320 then 400,600,1000,1500. I then used diamond compounds through various grits in a swirl motion like waxin a car to get rid of all the sanding marks. It was very shiny by this time. Then I used the sanding balls for a drill that is basically a scotch bright ball and I use that to apply the even and Uniform lines that go from spine to edge. Then I put a fresh convex edge on it.