I used Outers Blue cream with good results. I heated up the pistol in the oven (minus the grips) after I cleaned the whole thing with lacquer thinner. I wore vinyl gloves and kept actual handling to minimum. After I applied the blue and let it sit for a bit, I didn't run the pistol under cold water but used a clean damp cloth to stop the process, wiped it down with a clean flannel cloth, and gave it a light coat of oil. It came out pretty good.