Yeah, I think if clearcoat goes, you're pretty much screwed. There may be newer/better repair products out there now, but the last time I had to deal with it was around 1990, and nothing I tried worked. 1986 Jeep Comanche. If you look at any of them (and Cherokees) from around 1986-88 model years, pretty much every one of them has a blotched hood and top from a crummy factory application.
My Comanche ended up being my beater truck that I kept for around 16 years, so I didn't care too much, but it would be a bummer on your primary ride with repainting being your only option. I guess the bright side is that it's the rear bumper versus a more visible area.