OK guy's I know it sounds strange. This is the old house I was raised in as a kid, and I have been, and will continue to use it as a camp. But a nice camp. It has been neglected for a long time, don't remmember the last paint job, but was not much paint left, but it is time for a face lift. I have replaced a lot of rotten sills, joist, rafters, flooring, etc. Probably cheaper to dig a hole and push it in. I hope you get the picture. I am not afraid of work. The original plan was to clean paint off of walls, then prime and paint. Which still may happen. I got the walls cleaned off, and my wife, and I liked the look. (I could take off rest of paint) But I know I can't leave it like that without some kind of treatment, and expect it to last. I also do not want to have to treat every year. I thought thompsons, but thought it may not seal behind the paint? I thought a poly would yellow , and or peel, crack? I forgot the name, but saw a concentrated powder that can treat. I do not mind painting, just weighing my options. Any more Ideas?