Re: Help... mold in old UV, strong smell
EDIT: Revising my previous reply.
What did you use on the neck? Can I assume it was some kind of food/edible oil like olive oil, vegetable oil, etc? If so, don't ever do that again, because this is exactly what can happen: they can go rancid. It's usually not a huge deal if they do, but in some rare cases it can result in mold, bad smell, etc. Especially if you over-saturate the wood with it.
Whatever the case...
I'm actually not sure what you can do, but I'll tell you what I would do if a guitar came to me like this:
1. Take the neck off the body
2. Remove all the neck hardware (locking nut and tuners)
3. Proceed to steel-wool the hell out of all the wood (not the glossy finish on the front of the headstock) with #0000 steel wool. Go WITH the grain of the fretboard; same deal on the back of the neck. If you're lucky, the steel wool will suck some of the old oil out, but it isn't going to get all of it.
4. Consider hitting the fretboard wood with a light swipe of Naphtha as well (optional)
5. Give it a few days to try/air out before applying a fretboard-safe oil, if it seems dry.
6. If it still smells, try putting the neck inside a sealed garbage bag with some zeolite odor absorbers. Disclaimer: I've never tried this, but I heard someone say their tech used this to deal with a serious mold issue they had due to an excessively wet guitar.
EDIT: You might also try a mixture of 4 parts white vinegar and 1 part warm water. Dampen a washcloth with it and go lightly over the whole fretboard with it, then wipe off any excess (you don't want the neck wet/damp). You may even try a very soft toothbrush--going with the woodgrain. This might help kill any mold spores as well as any smell.
Honestly, I have no idea if this'll work. I'm just telling you what I would do to try and remedy the situation.
Good luck, and let us know how things turn out.
Last edited by webmaestro; 04-24-2016 at 01:33 PM.