Seriously?! -- Vinegar works as a wood stain when you add a metal object in the mix and let it sit in a glass container for a week. A handful of pennies will produce a beautiful pale Caribbean blue stain. A wad of steel wool will give you a rich reddish hue. A combination of tea and a metal object in vinegar will produce a black stain. Log this away for later.
Naturally Repair Wood With Vinegar and Canola Oil. So, for a super cheap, use 3/4 cup of oil, add 1/4 cup vinegar. white or apple cider vinegar, mix it in a jar, then rub it into the wood. You don’t need to wipe it off; the wood just soaks it in.
using 3/4 cup of oil & 1/4 cup vinegar to restore wood on old furniture without having to strip the pieces