Never heard of it before. Ill study up on it. Thanks for the tip. HBN is a pain, but it does work really well if you do it right.I"ve gone the opposite route using the Machine gunners Lube as my protectant for all my barrels.
The chemistry is complex but you can read about it here:
I've been using it for about six years now in all of my rifles and all I can say is that it seems to do exactly what they claim it will.
You will never have to worry about it building up in your bore either if you simply apply it on a wet patch then run a dry patch or two to remove the excess.