I bought a Mothers clay bar kit Tuesday night, got home around 6:30 and by 9:30 I had run the clay bar over all the painted surfaces, as well as the windows, and waxed and polished it. Same results for me - smoothest car I've had. It doesn't take out scratches or cover small chips but it does physically and visually smooth the paint as well as make the paint look deeper and richer. Well worth the 3 hours of my time.
I've never had a car with paint that was anything to look at before my '02 wagon (in world rally blue). After 14 months of ownership I still park so I can look at it My neighbors crack jokes at me cuz I wash it every 1-2 weeks but I can say I consistently have the best looking car in the cul-de-sac.