I always use the WD-40 on the jointer, planer, and table saws, etc in my wood working shop. I then use some Simple Green to clean them off before I use them and then spray them down again afterward. It has worked for years. I'd hate to think how old that jointer of mine is and still no rust. It is one of those Sears & Roebuck fully constructedcast iron models with four blades, and if you want to move it you better eat your Wheaties...