First off, let me say how sorry I am that I suggested that you take the car in for a warranty repair. I just can't believe the crap you are going through. I wish I could take care of it for you. Such a pretty car and a pretty color, I would've enjoyed working on it.
Dried compound is very difficult to remove. Use some isopropyl alcohol, that usually softens it up. Sounds like your clay bar treatment did the trick though. Did it remove all of the residue?
So you're saying you got it off the panel? Which panels did they paint exactly. Are those pictures of a factory paint job?
It does look like some sort of print.