No problem staining the neck or fretboard you see a lot of flamed maple necks stained on PRS and Kiessel before final finish.
The paint not sure but there a few signature guitars out there with solid coloured fretboards like the Matt Heaffy white epiphone. https://guitar.com/news/epiphone-lau...ature-guitars/
So its obviously possible but what you would use for the wear requirement I have no Idea