My plan was always to stain the fretboard black, not necessarily super black but certainly darker and with a more even colouring on the grain. It's an unbound neck so no barrier between the rosewood fretboard and the nice clean light maple… which made me very wary of stain bleed/creep.
I was planning on two stain coats so as a test I masked up halfway along the fretboard edge so I could gauge the bleed potential of the stain and how well the tape would work for protection.
Fiebings oil based dye, it seems to stain pretty much anything it touches… wear gloves and don't get it on anything you don't want black. I apply it just using a cotton tip, works well for fretboards.
1st coat on.
cont.