Barn siding?

I’ve tried a lot of chemicals, I’ll look through my stash and see if that was one of them. Thank you for the idea! It’s interior latex paint but he put it on thick and it get into every crevice of the wood. We’ve used a pressure washer, assorted brushes/wheels and a beam cleaner. Beam cleaner worked the best but still a big project!

We got a good deal on the property due in large part to the damage but it’s certainly a major hassle!