I had to replace the seat on my Bobcat recently and used my needle scaler to remove the rust from the metal base the seat mounts to. I was pleased with the speed of removal, for heavy flaking rust it can actually work as fast as blasting with a fairly large sandblaster. You don't have to wear through the rust as with other methods, it can "peel" or scale layers off. You don't get a white metal finish but do end up with a pretty tight surface.