I have a Winchester 1886 in 40-82 MFG 1889. My issue is the **** octagon barrel. Whenever I get a spec of rust on any other round barrel rifle, I just buff it out and re-blue. Now with the 1886, I spent a whole day taking the rust off the barrel markings, abit around the receiver, and the edges of the octagon barrel, it looked great! The next day, I woke up and took a look at the rifle... The rust already was visible on the edges of the barrel.
So I asked a gun smith, and he said there is nothing to do. It's common for octagon barrels to rust on the edges/corners. It dosent affect the performance at all, it just looks ugly.
Im just looking for any piece of advice if someone has any. Il try to post pictures of the rifle and a video if I can find one.
Video: https://www.youtube.com/watch?v=-tN9bj5Is2o