Dirt/Dust On BASECOAT: Description
WARNING: This page is about a different car, the 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
Particles embedded below the clear coat at the surface of the basecoat color or in the basecoat become magnified or exaggerated. If the exception appears to be extensive, close examination will reveal whether it is dirt or dry-sprayed basecoat particles that have been re-dissolved into the clear coat resulting in a spiky effect.