Yes, I have heard about that when they only put a thin layer of paint on just to save weight.
And as you know, painting the same colour onto plastic and carbon fibre to match the metal panels of the car, the colour is never quite right, just slightly off, but un-noticable from a 1st glance.
Getting a clear coat on the carbon would look nice and maybe have a think about the Dry Carbon look.
Kinda gives the bonnet a satin finish and looks tuff!