This is really cool, use glue with a stencil, stain wood, you're left with a two tone beauty. Unfortunately you're left with the glue on the wood. Would be really awesome to be able to peel up the glue to reveal the actual wood. I guess hot glue might work instead. Might try it on a scrap of wood first.
Great of ageing wood, I also use vinegar with a couple of copper coins and a spoon of coffee, leave it for a week and its ready to use, gives a lovely naturally aged finish to new wood or just to blend in cut ends...:
Make NEW wood look like OLD distressed Barn Boards
Using Vinegar As A Wood Stain 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.