Not having a grinder, I use 300 and 600 grit diamond plates for shaping the correct angles. Then switch to a 1200, then 2000 grit for polishing. Lastly, I either use fine film in low micron sizes, then hone on a leather strop with some Simichrome on it. The edges really cut well, and only require buffing/honing on the strop when starting a new job. I use the 2" x 6" diamond plates.
I glued the diamond plates to various pieces of wood to get the 1/2" height for sharpening gravers. That height is required for the Lindsey graver sharpening system.