After using brake Buster for a while, I finally came to the realization that it just doesn’t work. I mean, if you like a lot of scrubbing and different brushes to reach the barrel and spokes and then clean the tire. I guess you can call it effective. I was looking for something that was touchless. You spray it. Let it do the work and then spray it off. Shine supplies wise guy does exactly that. Bravo sirs. Bravo.