Above are several before and afters and 50/50 pictures from a black Camaro that received an intensive multi-stage correction. The majority of the defects were from poor hand washing and drying techniques. The soft black paint was left looking better than new after paint correction.
These are photos from a well used F-150 that came in for a multi-stage paint correction. The difference in clarity, gloss, and saturation was really insane on this metallic green paintwork. In the before, you can see wash swirls, improper buffing marks (rotary swirls), and deeper scratches. After compounding and polishing those marks are removed leaving a glossy finish with much more clarity and reflection.