Diy White Washed Wood . Allow it to fully dry. Once your wood is prepped and cleaned, test your stain on a scrap piece of wood or inconspicuous area. How to Whitewash Stain (Plus FAQ & Staining with Minwax Pickling from www.pinterest.com Brush or roll on the paint. To make the whitewash paint, dilute regular latex paint with some water (1 part water to 2 parts flat white. Here are my favorite ways to whitewash oak, cedar, poplar, and fir.