You’re saying the clear hasn’t cured fully and has lost its integrity from the damage... yet it has the strength to pull the color (which you say is not the problem) cleanly off the primer?

Given we’re doing carguments:

I had a bonnet (hood) re-sprayed after a collision. A week later I was unlucky enough to get a large stone chip. Bad luck for me... except when it just kept flaking further and further along the panel and pulling more colour off I called the body shop to get their opinion on it. After they inspected it they acknowledged that something had gone wrong with their process or products and they re-sprayed it at no cost to me and it was perfect after that.

I’d expect the same admission and fix from a pinball company as it’s fundamentally the same problem.