After re bluing the other day I looked down the barrel of one of the lee enfield my buddy gave me. It was the 1942 Canadian. I saw orange rust about an inch down the barrel. I immediately grabbed my dewy rod and scrubbed it about a good 20 times dry. Dust comming out the muzzle as expected...but not a lot. I then grabbed gunslick foaming bore cleaner and sprayed it in. About a half hour later I sprayed in more and solid midnight blue foam cam out the barrel. I reapplied two more times in an hour with the same results. I then srubbed it with the dewy a good 20/40 times and Putin more foam. It came out black the first two foam sprays then solid dark blue angain. I repeated all the steps in order again with the same results and left it overnight. I’m not in fear that foaming bore cleaner going to etch my barrel...imo it’s too weak of a product. I sprayed more in this morning and solid midnight blue foam came out again! I let it set for 20 minutes and scrubbed it till the brass brush unscrewed itself and then sprayed in more foam. White foam with black on it came out. I’m sure after 20 minutes it will be blue again with the next application. That rifle must have seen service! How many times am I going to have to foam the barrel before it cleans out? I’ve never seen that much blue come out of a barrel ever. My varmint guns maybe two foams, three max, and the blue is out...and that’s from a two to three hundred round session.