Home New Chic Fashion 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.