I had a light layer of rust so used this gun cleaner on the slide (i've used this cleaner hundreds of times on my glock with no problems). it took off a good amount of the rust, but along with it, the black finish! It looked really bad so I just stripped it off and polished it. It looks pretty cool, almost like a graphite or black chrome finish with the bare metal mixed with some of the black finish still left but its totally unprotected except for some armadillo. haven't decided whether i want a CCR refinish or see if Springfield can fix it. if they put the origional finish back on, no thanks.