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.
I started doing this and will never stop! My tub shower are always spotless-so simple. Simple shower and tub cleaner: fill wand half and half. Wet surface and scrub. wow! leave in shower wash while you are already in there
Naturally Repair Wood With Vinegar and Canola Oil. ~ 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.