Hello Freezer. Sounds like with your system you are more of an expert on bluing than I am but I will tell you how I have gotten excellent results with 44/40. For example, recently I did a S. Armory 1911. First I removed the oil with plain rubbing alcohol (I'm cheap) and then put the parts in a pre-heated 200deg. oven. When the parts were warm I applied the 44/40 with a cotton rag, let it sit one minute and then washed them off in the sink,dried them with a towel and repeated about 30-40 times. I know this is pretty basic and won't work for all applications but I was truly amazed at the results-almost factory looking. Kix