The only real cure is to prevent brake dust to start with, there were some brake dust shields available in short supply from a couple of US vendors and online in the US, but have long since been discontinued.
Weapon Outfitters has the QD Brake Shield for AAC Mounts by Simplistic Shooting Solutions in stock. If you’re running an SBR with a brake, the gun can be LOUD. Some like it that way, but not everyone at the range is going to appreciate your particular taste in noise. Use the QD Brake Shield when you don’t have a suppressor in place and it will direct the gases and noise forward, away from the shooter.
Lift the vehicle using the floor jack near the quarter panel of the wheel you're removing the brake dust shield from. Secure the vehicle on a jack stand.