Todays paints contain so much additive for UV protection that some orange peel in the clear coat is the norm. Dont take my word for this , go from one new car lot to the next and look for it.
There is a devil in the details of painting the engine bay. There are a handful of small spots where the paint gets scratched away to ensure chassis ground paths.
GM does have the prettiest blues. Years ago they had the prettiest greens in the charts too.