The clearcoat on my MY98 has had a few issues.

At different stages during the cars life, I've had to respray the rear spoiler and then all the plastic pieces on the bonnet. The clearcoat just started cracking and peeling starting from when the car was about 3-4 years old.

The paint in some areas is also quite thin meaning that it's exposed the undercoat in some edges, notably around the boot, and underneath the plastic roof gutters..

I've also always used Meguiars or Autoglym products too.

It's just pot luck I suppose.