I'm running an experiment. After washing the FJ this weekend, I applied the tire shine, it was a 'Gunk' brand. After dojung the tires, I sprayed the product onto a wad of paper towels and wiped down the wheels as well. Looks great and the wheels are a nice shiny black again. Of course it will probably come off the next wash, but I plan to make it a routine part of my wash cycle.