I had my plane painted within the last few years, and wanted to do a two
stage paint, which looks arguably better (matt color coat/clear coat).
However, with three different colors, the paint all had to be applied and
clear coated within around 48 hours, otherwise the bonding would suffer.

Putting clear over a glossy finish also required sanding the entire surface
to improve adhesion.Overall, it wouldn't have worked very well.

I suspect that once the clear coat starts debonding from the underlying
pigment layer, you may be in for some future problems, but perhaps they
could sand the surfaces down to the pigment layer and put another clear coat
on top.