I already have... no difference, except that the slide seems to be a bit "slicker" which might be the lack of friction. I got a very nice "glass" finish on the chamber where it shows through the ejection port, but didn't try to get that high a shine... especially where the ridge at the muzzle locks up with the bushing. Got it nice and shiny, but in truth the barrel isn't seen that often except when it is locked back.