DIY BARN WOOD :: She stained a piece of scrap board with Minwax white tint base wood stain in Slate and realized it was a bit too dark for her liking so she mixed the stain 50/50 with water which made a big difference. She let it dry over night and the next day used some ASCP in Pure White to white wash over the wood (mixing 1-2 Tbsp. with 1 cup water). She brushed it on then wiped it off with a paper towel. :: CLICK or here's another link: www.hawthorneandmain.com/2014/09/diy-barn-wood.html
1 part water 1 part white flat finish latex paint I usually use about 3 tablespoons of each at a time. Then, I use a washcloth and soak it in the mixture. Then, I wring out the washcloth. Then, I go over the whole piece with the washcloth ensuring complete coverage. Use dropcloth.