You are supposed to use it with #34 final inspection spray.
You take the meguiars clay bar (half of one), put in the palm of your hand, make into a patty, then get the #34 spray and wet the clay, and spray on the surface of the car and just rub the clay bar all over the section until smooth, then with 100% terry cloth wipe down, then i use a polishing rag and wipe down even further.
like langit said:
Follow up with #7 show car glaze
then with the #26 Yellow car wax
then you can compare your paint to a baby a$$ and see which is smoother.
I love meguiars stuff.