Would love to do this for our privacy fence - with wood going horizontally// Dating back to the the shou-sugi-ban process can vary, but typically involves applying fire to the wood’s surface, cooling it, brushing away excess soot.
Use Baking Soda and Vinegar to "quick weather wood" to look much like driftwood! Remove finish on wood with ratio of baking soda and water. Spray with vinegar and let sit minutes. Then scrub it off with a brush, rinse, dry, and stain or paint it.