So I traveled with the bass yesterday.. needed a drill press for the string holes at the bridge.
It was too dry outside, and the result was a thin long crack over the fretboard which I noticed at the end of the day.
A very noticeable crack, both visually and physically.
Got back home, poured stewmac's thin (10) superglue on top of it, and let it cure for the night.
Here's what I got now, perfectly disguised, all black and sanded nicely. (marked area was sanded 320 to 400)