Abrasive Finishing Systems offer four different grades of surface conditioning discs, coarse, medium, fine and very fine.
Coarse Discs – Light weld removal. Leaves a 150-180 grit finish
Medium Discs – Will still remove some material. Leaves a 240 – 280 grit finish
Very Fine Discs – For blending coarser discs. Leaves a 320 grit finish.