Yeah, it is worth stating again that the wheel has to be completely clean and it has to have time to dry. I had just a few very small spots of brake dust on accident on the wheels when I applied this stuff, and it locked the dust in the wheels' finish. It is gone now (I think), but this stuff is more of a pain to use than I thought.
I am going to experiment with it again, and see if it works better. Right now, I am trying to solve the problem at the source by using some low dust brake pads. I will test it on my factory rims a few more times, but I will have my custom rims on my car soon, and unfortunately, I don't yet have the confidence in this stuff to put it on my new $4000 rims.
Using A2Z on my rims has been good enough, still unsure as to whether this product is worth the time, effort, and money.