Brass bristles are the safest Election for cleaning brake rotors.
Brake rotors are workman to a character of contrasting forces that can aim them to corrode or To gather wick deposits. Wire-brushing is a credible means To cleanse a rotor, if that you displace a rare picnic rules.
Materials
While some hardened steel rotors might be able to resist the bitter abrasion of a steel-bristle brush wheel, most cannot. If the rust has penetrated the rotor face enough to cause visible pitting, you need to replace the structurally compromised component before it shatters under heavy usage.
This is as much to keep brass wires from flying off of the wheel as to protect the rotor. These wires can easily embed in exposed flesh when they fly off of the wheel.
Exceptions
You should only use a wire brush To cleanse light to medium rust or deposits off of the rotor surface. For power tool applications, use only a brass wire brush on the rotor face to eliminate flash rust and deposits. Steel bristles are safe if you use a handheld, toothbrush-style brush.
