My cheap Brembo stock rear discs are not showing any rust. Powdercoating is generally a stronger finish than paint but if you prefer, I believe rotora has anodized calipers. There is nothing wrong with the suspension of my car. Braking pulsations go away after using the brakes agressively but I do not do that often. The rust ring does bother me as a significant portion of my choice to get these brakes was aasthetic. With 18" rims the factory brakes look little. I don't care what you think of my reasoning.