Frontier Metal Cleaner looks a lot like a steel scrubbing sponge made up of thin coiled ribbons of metal. The coils are composed of a proprietary alloy containing stainless steel, nickel silver, monel (a corrosion resistant nickel based alloy), and zinc. The alloy is effectively "harder than rust but softer than bluing." As a result it can be used to scrape the rust, dirt, and dried greases and oils off blued steel without harming the finish. Moreover, Frontier Metal Cleaner is significantly more effective than other "sponge" cleaners like bronze wool due to the shape of the individual strands. Since each strand is a thin, ribbon of metal with sharp leading and trailing edges, the "sponge" has the effect of hundreds, if not thousands of small razor blades scraping away at surface build up. Steel or bronze wool, which is round in cross section does not have this advantage. To add to the cleaner's versatility, it is extremely effective at removing lead deposits from the bore, and goes a long way toward cleaning copper buildup as well. To use the cleaner on the bore, cut a small piece off the pad with a scissors. Wrap the strands around and through a bore brush, and then run the brush through the bore as usual. You will be amazed with the results.
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