no offense but depending on the handles I would leave them as is. Also there is a member actively looking for a TBLB and might be interested as is. just saying. A few lines add character in my book. As to grits, the Busse G10 I have is not so shiny to be honest. The grits I use when making my own blades are 80 to 120 for shaping depending on material I want to remove, then 220, 400, 600, 1000, 1500, then wet sand at 2000 and it will be mirror or close to it. For a handle it should not take too much. Sometimes you can get a pack with a few sheets of each grit in the finer sizes. Finish grit packs or wet sanding packs. I sand at different angles then I can see the previous sanding lines, sand with next grit until they are gone, move the higher grit, repeat. I finish mine off on the buffer with some red then white polishing compound and its just about a mirror by then or at least close enough for me. I use 80/120/220 for 80% to 90% of all sanding. The rest is just polish.