Yeah, I hear you.
I've switched to a Megs yellow, and while softer (but open cell foam), seems to work the polish better than the orange, which is a closed cell foam.
I tried to finish off with #80 but, again, not satisfied. I switched to
Menzerna Micropolish and wow!
You know, whenever I have polish trouble I go back to Menzerna and it bails me out. I don't know why I move away from it in the first place.

Probably just thick.
Is the H2 made by GM? I guess what I'm asking is whether it has the same hard paint as the C5.
Any other advice anyone has with US cars? Yukon?