I have an electric guitar, and its fingerboard in is rough shape after years of barely touching it and being lent to my younger brother (big mistake). I unfortunately don’t have an instrument shop close, so I would have to order oil for it, and even the closest one only carries like 1 or 2 kinds of string kits and a few arranger keyboards, not cleaning products.
While I probably could get mineral oil (not at the moment of writing this, due to weekends), I’m wondering how well cooking oil would work. Tried some grapeseed oil on some other piece of wood, where it wouldn’t be a problem.
NOTE: Likely will go with the mineral oil, so I also have something to clean strings with.
24h is not enough time to build coats, not for BLO and absolutely not for any natural oil.
You need to wait much longer, else you’re just saturating the wood more and more (which isn’t necessarily a bad thing).
The oils will take much longer to polymerize in the wood, you can prevent any spotting by wiping off any excess if it shows on the surface.
24 hr is enough if the coat is thin enough.
I don’t think that’s the case. I tested the drying time of different oils on a sheet of plastic in optimal conditions (summer, sunlight, next to an open window) and it still took 2-3 days for the first ones to dry (being tung oil and perilla oil, I think).
I don’t see how you could accomplish that on wood, unless you’re using drying agents, of course.