Accumulator
Well-known member
IMO a recommendation from Stokdgs is really something, so even if peterp doesn`t go that route I`m glad the suggestion got posted.
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I know I`m late to the party, but that looks like a case of classic rail dust. The term rail dust comes from iron contamination resulting from trains wheels contacting the tracks and in braking/accel/slip situations creating airborn iron that can travel in the air or stick to cargo (new cars being transported by train).
In this case, it looks like the rail dust is a result of brake pad abuse, actually letting the brake pads wear out to where there was no pad material left, and the pad backing plate (metal) was grinding on the rotor, and making the same situation occur. As the metal grinds, iron particles become airborne, sticking to the wheel mostly as that encapsolates the rotor to a large degree, but as the car is in motion, some flies out of the wheel area and onto the paint behind it. It may not be obvious at first, but then moisture and in this case salt (NY/NJ/New England roads) cause the iron to oxidize and turn orange. This happens rapidly and the more there is, the more it bonds to the surface.
This can be a case of neglect (letting pads wear out, maybe without even noticing if not a `car person`), even some people knowing the pads are worn and just choosing to leave it as is. Another case could be stuck calipers, that wear pads rapidly, and in the case of metallic pads, the brake dust itself could cause rust.
For the oxidation/rust specifically, you will need an iron remover. I have used iron-x on wheels that had stuck calipers leading to a similar look as your wheels. Remove the wheel from the vehicle when you do this though, and do so in a well ventilated area as most iron removers STINK.
Thanks for all the great feedback. I have a product I bought from the UK called "Wonder Wheels" wheel cleaner that is pretty strong. I wonder how that compares to Meguiars Wheel Brightener. The Meguiars seems like a screaming good deal in quantity, but I wish it came in something smaller than 1 gallon.
If you could get your hands on some Brown Royal for those wheels, I’m sure it would help greatly.
I found it on Amazon, even in a 32oz spray bottle..
Dan F
Next time you have these black spots that most likely is tar spots. Start with a great tar remover and followed by an iron remover. Sometimes the tar easier get cought in the iron particals and kind of embedded them. That`s why I always start with the tar remover and then the iron remover. You solved it though with the clay but it`s more easier with chemicals.
I have not used Chemical Guys polishes but seen many that has been disappointed with them so maybe go with another brand would be good.