What's happened here?

[Naughty Boy]

These where refurbed back in August m, car has been parked up for 3x weeks, washed it today and all four alloys are covered in these marks. Alloys sealed with poorboys.
It's not on the surface either.

Any l ideas fellas?

 

[smac4494]

Looks like brake hot brake dust on wet paint. Probably used the wheels too soon.