We just a cabin that is 75year old we are in the process of restoring it.From what I can tell it appears it was originally stained and then painted with many coats of paint. This past week I hired somemone to corn blast the exterior. It turned out GREAT very little rott to my surprise. My question is this I am going to sand all the logs with a orbital sander to some out the what the corn blasting had done. Here comes the question should I treat the logs with any type of chemical to prevent wood