How does a wire brush work?

 The wire brush is primarily an abrasive implement, used for cleaning rust and removing paint. It is also used to clean surfaces and to create a better conductive area for attaching electrical connections, such as those between car battery posts and their connectors, should they accumulate a build-up of grime and dirt

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If clean the inside of the barrel of my gun with a stiff wire brush, will that change the rifling?

  A brass wire brush of the correct size for the bore will not change the rifling cut into the hardened steel barrel, but over time it will alter the ballistic signature used to distinguish between bullets fired from guns of the same make and model via forensic examination.  Any significant abrasion will alter the signature, such as firing 4 boxes of ammo (200 rounds) at the range.  This is a gradual process that occurs due to normal wear. If a criminal needed to drastically alter the signature immediately, a rat tail file would be run through the bore, and other parts would need to be altered to change the markings on ejected casings. A brass brush is typically only run through the bore ten times per cleaning session, which will produce far less friction than repeatedly firing it. It would require about ten cleanings to make a noticable difference. It is unlikely this would effect accuracy in anything other than a competition firearm. Nylon brushes produce less friction than brass an
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How do you keep rust off of steel that's been sanded or wire brushed?

How do you keep rust off of steel that's been sanded or wire brushed ? Option 1 - keep the humidity of the environment below 70% rH. Option 2 - coat the clean steel with oil or corrosion inhibitor. Option 3 - paint it. Option 4 - apply a ‘conversion coating’ such as a phosphate wash that will prevent atmospheric corrosion on a temporary or semi-permanent basis. Option 5 - electroplate zinc onto the steel. Option 6 - dip it in molten zinc (i.e. galvanize it). Option 7 - Sheradize it (usually only applied on small components) Option 8 - Aluminize it (as above). Option 9 - Apply a sprayed metal coating such as plasma- or HVOC-applied aluminum or nickel alloy (but make sure the component is designed for the application of such a coating, also that the coating itself isn’t too thick, and that you apply a seal coating to block any residual porosity afterwards). Option 10 - Apply a weld-overlaid coating, for example a hard-facing cobalt alloy, or a weld-or laser-applied alloy cladding. Mo
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