J-B Bore Brite is a micro-fine paste compound that works as both a cleaner and a final polish. Regular use gives your barrel a mirror-like finish that helps prevent build-up of copper and carbon fouling. J-B Bore Brite liquifies during use to quickly remove fouling and powder residue in rifle and handguns, and plastic deposits in shotgun bores. Regular use between strings minimizes accumulation of fouling to help maintain accuracy.
Sinclair, Issue:4A, Page:149