Any ideas why this is rusting? (and how to remove)

[valentinoamoro]

Appreciate the advice (my first instinct is to spray WD40 on it and use a tooth brush). Note, it was there when I had the OEM PP wheels. It seems like water is getting trapped and there is galvanic corrosion between the OEM wheel (which is cast alum) and the wheel hub (iron?)

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[BmacIL]

It is mostly classic oxidation rust, though there's a small amount of galvanic corrosion between the wheel and hub too (which is why anti-seize is a good idea). You can get it off with a wire wheel. The hub is iron.

 

[Kong76]

I just removed my vmb7s after a week and noticed one of my rear wheels had this burnt on rust/oil around the lug holes back side surface. Tried washing it off but no go. I thought at first it had to do with heat or wheel slip of some kind. Looks like this may be the case. Never noticed rust on the hub though.

 

[Stripler]

Rusted rotor hats are a common problem on a lot of cars. Some people will clean and then put high temp paint on them. After market wheels tend to show this ugliness more since they usually have a more open spoke design.

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