Yesterday I tried it for the first time together with a pressure washer on one of the four wheels to see if it really does the job. I hadn't washed the car and especially the wheels in order to make them look like new. First, I used the pressure washer to remove the dirt. Then, I sprayed it on all parts of the wheel and waited for 3-5 minutes as stated in the instructions. After that, I rinsed it with the pressure washer. Not all the dirt in the difficult areas of the wheel had been removed. So, I repeated the whole process but this time, as the instructions suggest, I also used a toothbrush for the difficult areas. I scrubbed the difficult areas without needing much force and the old stains easily disappeared. Guys, the wheel looked brand new. Only 2-3 scratches remained from small impacts that I had caused. However, all the dirt that had been there for years was gone and the wheel looked like new.
What I suggest and will also do from now on is, the first time you apply the spray, after waiting for 3-5 minutes as the instructions say, to scrub all the difficult areas with a toothbrush. This way, you might only need to use the spray once.
