I understand the intent...next year my (then) 11 year old Camry's bug/sand/rock pockemarked hood will get a respray with EXTRA layers of paint and clearcoat...
THIS year the hood got a new "rug" (black over tan, pseudo-panorama roof) as the it was starting to fade...the sides have some dings I'll live with...
Overall adding more layers of paint and clear are not going to protect from chips any better. Most likely it will be worse, to harden fully paint needs to release the by-products of the hardener reaction, and this continues even after the clear coat is applied. If the paint is applied too heavily the bottom-most layers may not be able to cure properly, and not bond as well with the primer. Then when a rock hits the thick paint, not well-bonded to the surface, it will chip readily.
Or get a bug deflector. That will take care of a majority of hood damage. Of course it does nothing for the bumpers and such.Makes sense....the other thought I had was to apply a few coats of clear Plasti-dip to the front/leading 12" of hood.