This set of barrels is off a 1901 F grade hammer gun. They are what is called Fine Damascus and unusual to find these on a low grade hammer gun.
I gave these barrels 4 rustings and 3 boilings and 3 etchings. I seldom go farther than this because the rest of the gun is not finished. If I had it case colored, then I would bring out the barrels to match the rest of the gun.

When I first looked at this gun before bidding on it, but could not tell what type of barrels it had. With this one, and another hammer gun that has Chain Damascus which is also unusual.
These Chain Damascus are from an 1897 F grade hammer gun. Just enough to bring out the pattern and that is it.

For a final coating, I use boiled linseed oil heated lightly and rubbed on with a cotton ball and let dry till hard. Lasts a long time.