There is a new company making cleaner and gun blue called blue wonder and there products work as advertised. I used some of the cleaner to remove light rust from a shotgun.I didn' t even use steel wool or a bronze brush at first because of fear of a new product. I used a plastic brush and that was enough on one gun.Didn' t hurt the finish either. Then coat it up RIG. Brownells and Natchez have their stuff or you can go direct to blue wonders web site. Their bluing for touch up is the best I' ve ever used.