Cagey said:I did a black Ebony neck recently before I fretted it. I should have taken pictures. But, I'm not sure it would have eased your fears. It was getting stainless frets and those were going to be leveled to within a gnat's eyelash. As pretty as it looks and as sublime as it feels, the real concern on fretless necks is that they don't have any hills/valleys in them. The slightest variation can cause problems. But, seriously: unless you go apeshit with the coarser grits in a concentrated area, you've got nothing to worry about. Once you get to the finer stuff, you're not changing the plane of the surface at all. If I were doing a fretless, I wouldn't hesitate. Burnish it, and make everybody envious.
So would you say stick to 600-2000?