adventurenali92
Full Access Member
Nothing on the wheel. The black is under the chrome.
Knowing that’s it’s “under the surface” so to speak I’d venture a guess that it’s the chrome surface pitting off. It’s very common with GM chrome wheels.It's possible somebody had tar on the wheels before you and used a type of acid cleaner to remove it. While it removed the tar its possible it removed the coating as well. Especially if it was only on 2 wheels.