The product is simple to use but lists step by step instructions for better results.
Did you wash the wheel and use Rustopper after the car has been driven or after it has sat for a while?
Did you wash your wheel, rinse off the soap and dirt, then while still wet spray Rustopper liberally on the face of the rotor?
The rotor should be wet from the solution and should be allowed to dry before continuing on the rest of the car.
We have not had any other unsatisfied customers, some just needed a little direction on how to use since it’s such a new product.