Army Ranger said:
So Mike, your saying dye the whole handle, then go back and buff/sand of what you don't want?
If it was mine, I'd stain the scales/round first, buff with the brush, then install, buffing on a machine would be the last step before sharpening the blade.
I don't know if you're making a full tang, or stick tang knife, but if it's full tang, take as much off the inside of the scales as you can, to get close to tang size/thickness you want, saving the textured surface as much as possible.
You will still have to take some off the sides, but that's normal, and will provide a nice contrast to the darker top.
If it's a round, for a stick tang, buff with a brush, assemble the knife, and if you have to take any off, it's usually near the guard area, and again the contrast won't be bad looking.
Maybe others have better suggestions?