for leveling, you would need a straight edge that can span across the whole fretboard....pretty sure they sell specific ones. you just put it on, and on the high fret, you just file down with a metal file. polishing ive heard works with steel wool but never tried it myself
Quote by kangaxxter
The only real answer to the SG vs Les Paul debate is to get a Flying V and laugh at all the suckers who don't have one.

Quote by Blompcube

if you embrace inaccurate intonation it can be quite arousing.