I Zainoed my wheel before I mounted the tires. Z-1, then five coats of Z-2. Straight, no ZFX, just put it on a day apart. Now the brake dust just falls off. At least when I give it a quick polish with the Zaino spray glosser. Been a year now and the chrome looks like brand new. I give it another coat of Z-2 about every six washes. And I pull the wheels off every six months and spend about an hour on each one. Do the brakes and front suspension at the same time.