I'm helping my daughter replace the deck boards, posts and balusters on her deck. That leaves the rim joists, posts and stair stringers that will be re-coated with paint. The paint is still adhering fairly well but the pressure treated lumber is rather rough and wavy. I'm afraid sanding, even with rather rough grit paper won't get into the grooves and depressions. I'm considering one of these gadgets and wondered if it's suitable or is there a better way.

tool.jpg. deck11.jpg