Tested evaporust on some Damascus barrels I had laying around. Very impressive, only let them soak for exactly 1 hr. I was concerned about the solution attacking the welds or iron in the barrels but see no such thing. All light rust was removed.Rinsed them out with water and dried. Covered in Rem oil.
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]