Hard carbon removal from surplus rifle
I have a surplus rifle that has a completely black bore. I can tell that it has strong rifling, but it looks like it has been completely covered in rhino truck bed lining. I’ve thrown all the cleaners I can think of at it over the past few months, including JB Bore Paste, and it looks a little better, but it’s still black as the inside of a barbecue grill. I’m not getting any green patches with anything, but every so often I’ll get a grey patch with a very faint pale blue/green tint to it, so there may some copper in there too. What would you guys suggest to clean this sewer pipe looking bore?