>> boil down to surface rust on the braking discs You don’t fail for surface rust, it’s not a check that’s done. You fail for dangerous imbalance of braking f

>> boil down to surface rust on the braking discs You don’t fail for surface rust, it’s not a check that’s done. You fail for dangerous imbalance of braking force. When the car is run on the drum roller (rolling road powers the cars wheels) and the inspector presses the brakes, the braking force applied by the car is measured. You get a fail if your braking performance is likely to unsettle the car in high braking force scenarios. Failing here is a real problem. It doesn’t warrant a dismissive surface rust claim. Tesla does already periodically apply brakes even when regen would be enough to keep on top of surface rust. Tesla even applies brakes when excess water is detected: “To ensure brakes remain responsive in cold and wet weather, Model 3 is equipped with brake disc wiping. When cold and wet weather is detected, this feature ...” This has been a common feature on many brands for around 10 years at this point.