Of those two, we prefer the Oxpho Blue, BUT have found 44-40 to work better on more different guns...degrease the area, rubon with a Q-tip, burnish the area with the palm of your hand( this heats it up just enough as well as' blends in)......' repeat as needed
anything on 'bare metal 'is better than nothing BUT with some higher polish finishes (Pythons and model 27s??) you just may disturb, and cause discoloring of the surrounding areas.....beware, as well as the fact that ANY "cold blue" is ONLY temporary,not permenant...
