How do i get rid of factory anti-rust chemical

[privateer1939]

Gentlemen
i have just purchased a browning cynergy 12 ga ,o/u,28 inch barrels
i was trying to clean the barrels from the anti-rust compound per
the owners manual instructions and after many,many, patches with hoppes #9, rem-oil, and even synthetic spray barrel blaster, i simply cannot get a patch to come out clean-the "orangish" colored anti-rust stuff they use at the factory will not leave the barrel!!! I even used a nylon brush soaked in the aforementioned materials and i still cannot get a clean patch.
I am at my wits end with this problem im running out of patience--and patches!!!!!
Helllllp

tx

 

[oneounceload]

Spray some brake cleaner down the bore, use a bronze/brass brush for about 3 seconds and you'll be done

 

[Te Anau]

Id skip the brake cleaner,it could seriously damage the finish.Brake cleaner should NEVER be used on any gun IMHO.

 

[RsqVet]

Um brake cleaner is bad and gun blast ok?

Anyway anybof the aggressive solvents are ok on metal. Plastic / paint or wood very likely not so much. Controll the flow and you are fine.