Reply To: How often do you clean your barrel with JB bore paste?
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I disagree. I’ve put JB down mirror polished barrels and it stays grey if there’s no lead there. I think those of you who are gettIng black paste out of what you think is a clean barrel just don’t have the clean barrel you think you do. White patches do not equal a clean barrel. Lead can mix with the humidity of the outside (or from your air tank) and harden into a plaque that patches can’t make budge. Hard solvents can even struggle to loosen lead when its that caked in. I’ve seen lead solvent fail to remove lead even after a multi day soak. Only a good scrub with some major copper/brass abbrasives can get that sort of lead out.
Nor are you removing steel from your barrel with the JB. Nor are you removing steel if you have clean patches, then scrub with a brass brush, then get black. The black that appears after patching a “clean” barrel is simply lead plaque you loosened up. As long as black is coming out after a scrub, you’ve still got lead.