all I can tell you is that yes, the clearcoat is very thin on that paint, I heard this from a detailer at the chevy dealer I do business with.... he said that they were given special instructions to do all pre-delivery stuff by hand instead of with the rotarys they usually use. (this dealership only or not I dont know, and I dont know who the instruction came from)
Scratch-X might not be quite strong enough of a polish as it has more of a "filler" property to it.... I would try something like PPCL (Pinnacle Paint Cleansing Lotion) or the meguiars equivalent "Deep Crystal System" Step 1 cleaner. After this my advice is to start using the Zaino system, and try to stick with Z5 only..... since this generally fills these spider-web scratches you're describing, it may help you out at keeping them under control.
Another option you might consider is taking the vehicle to a paint shop and see if they can thicken the clear (honestly dont know if this is possible). to make it a bit easier to deal with. Also since the metallics/etc. in this paint are different than GM has ever dealt with, perhaps they are having issues with paint not fully curing from the factory ovens like most other paints?? :nixweiss
anyways welcome to the forum, love your ride, hope to see pics sometime!
BTW do you happen to have the 50th C5 registry URL you could post? just curious to check it out. :wavey Welcome to Autopia!