repairing my fretless bass, I'd bought this from a friend a while ago who'd bought it from an unknown individual. identified as a Vantage (defunct ~1994?) bass, from a mid-range fretted series marketed as touring instruments that weren't beaters but weren't expensive and stealable. confusion about this neck, obviously made by Vantage themselves for this bass, since this series only came in fretted.
found out why, though. obvious marks of defretting once the strings are off, and the fretboard wasn't fully refinished afterwards, nor coated. I posted a photograph of a spot where it looks like someone tried chewing on it, this is not the worst damage to the fingerboard. fingerboard has heavily dried out, worse near the tuner end, and is bowing only at the far end (even when truss rod at tension). Truss rod confirmed working.
The person who defretted this instrument did a very good job installing the lines and filling the remaining gaps, but forgot to replace the nut with a lower one and reseal the fingerboard, so the tuning has been haphazard at best and it needs a lower nut. Which is convenient, because the original nut came off with the strings and seems to be made of breakium.
Entire fingerboard needs to be rehydrated, refinished, and then coated (it's a rosewood fingerboard that was intended for a fretted bass, this wood is delicate). The neck needs a debanana, though, and that's best performed simultaneously with rehydration of the fingerboard. The fingerboard has a large number of gouges from roundwound strings (AAAAAAAAAAAAAAAAAAAA ROUNDS ON UNCOATED ROSEWOOD AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA) that need to be filled as well. Edges of the fingerboard are damaged and seem to be collecting human oil.
Neck has a few chunks of wood taken from it in the truss rod area (not in hand's reach), and the upper area of the neck needs to be rehydrated and resealed.
In-depth analysis of other portions of the bass come later. This is not the end of the issues.