I don’t have any of the pics any more because the host quit me, but it was about 2012 that i put pics of my copper cleaner test on Shooters Forum. It was a matter of covering bullets in various cleaners. Nothing comes remotely close to KG-12 for etching the gilding metal of bullet jackets. I do have and use Boretech products as well, and they’re quite good. Nevertheless, if I have a _serious_ copper fouling issue, it’s a waste of time to start anywhere other than KG-12, in terms of chemical cleaners.
