I got some pm's about the parkerizing on my krink build so I thought I would share my experience for those of you who want to parkerize your guns and get professional looking results.
The first 2 photos are of my AMD pistol that was a second attempt and didn't come out good. The second is my krink that came out as good as it gets.
I am using oow receivers and they are hard. I blasted the AMD with glass beads and they were not abrasive enough to remove the surface skin on the metal. I also did not use preblack and the manganese solution produced different colors on various parts.
I blasted the krink with 80 grit aluminum oxide, used a pre black solution before parking and got a nice jet black finish on the krink.