Removing Stain

[DennisCA]

A buddy of mine decided to touch up a mosin he had without taking it apart (I told him he shouldn't but he did it anyways) and got a bit of stain on some of the metal parts. Most of the stain is on the barrel bands. Is there something he can use that:

1) Will get the stain off?

2) Won't hurt the metal?

Thanks for the assistance

[grossekatz]

Paint thinner usually works, and does not damage the blue.

[hellayella]

Citristrip

[kcstott]

You'd be surprised what WD40 will remove.
or acetone
0000 steel wool and oil

[Milspec714]

http://www.homedepot.com/p/Klean-Strip-18-oz-Stripper-ESR72/100135467#.UikfHtJwqR8

works excellent