Hi, we are currently purchasing a chestnut log home in NY and it hasn’t been stained (outside) for probably 20 years. It looks extremely weathered. In the spring I want to start prepping for stain and urethane but I’m unsure of the steps I need to take. I’m wondering if a pressure washer is sufficient to take off the old finish. Also, once the power washing is done, if that is sufficient, what cleaner should I use? I’m thinking of going with Sikkens as my stain. Thanks!