My guess is that it could be road tar or maybe even tire dressing (flung off from tires). I usually can get this stuff off by using a quick detailer product. Less chance of scratching and adds protection when you're done.
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Me: 2022 Toyota Tacoma SR5 Double-Cab SB
Wifey: 2013 Toyota Highlander Limited AWD
Weekends: 2010 Nissan 370z Roadster
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