When I did mine I started with 400 and sanded until I could see wood and then moved up to 1500 and then 2000 and it's smooth as can be. I just didn't tape it off so it kind of looks like a hack job, which I still need to finish up and make it look nice...as a side note, if you do this and don't play it that often then you need to treat the neck with either 3-in-1 oil or lemon oil, etc. (don't use lemon oil on maple, bad things can happen) I you do play it a couple times a week then the oils from you hands should be enough to keep it treated.