Not that I’ve ever seen.
Most of the coatings that were added, were very minimal splattered on rubberized stuff. Never coating an entire panel, but seen mostly inside the doors and in little splurts on the firewall.
I don’t remember ever seeing anything from the factory on the rear wheel wells, and maybe only occasionally deep inside the inner fender on the kick panel. But not in the wheel well.
Doesn’t mean I’ve looked at every bronco ever built, so there might be exceptions. But I don’t remember ever seeing one.