Learning a bit about leveling, crowning & polishing frets. Working on crappy, old necks...they may or may not ever see "real" usage, but I'm enjoying learning on them. I feel like I have the hang of leveling, I'm probably halfway there on crowning, but I can't get them smooth at the end of the job? When I string up & play, the frets work well, but they are "gritty" for a while until the strings wear down the grit. I'm leveling w/StewMac "bar" thingy with sandpaper on the bottom. Then, crowning with hand files. Then, sanding with 600 grit sandpaper. Lastly, going through with some micro-mesh pads - I have a set of nine pads including 1500, 1800, 2400, 3200, 3600, 4000, 6000, 8000, and 12000 grits. I usually pick 3 or so pads to use. What is your process, post-leveling? How many times to you sand/polish, and with what grits?