Koch-Chemie Magic Wheel Cleaner|500ml Bottle with Sprayer|Removes Iron from Rims|For Cars, Trucks, Motorcycle, RVs, and More|For Home and Professional Use|Since 1968

Good- Lifts a lot of the brake dust and dirt. Watch a few videos and follow the routine of prewash followed by the wheel cleaner. If you are able to agitate alot of the thick layer over your alloys under the brake assembly, then it will do a good job. If you just spray it and think all that layer will just dissolve away, doesn't happen. So the more you agitate or scrub the dirty layer away combined with the wheel cleaner spray,the more effective it is.Could be better- The smell is very foul and will make the whole area stinky, so use in an open space where you can easily drain away the chemicals. Do not let it stay for more that 5-10mins, it may damage your paint.Is it worth it? You only use it once in a month or two, it does a good job. So, I would say it's a good buy.