Spray a light film of product on your car, one panel at a time.
Using a good quality micro fibre cloth, wipe over the panel to remove the dirt and dust.
Using a separate, dry micro fibre cloth, buff dry the panel you have just wiped over.
The finished result is a dry, clean, polished panel, which has a protective wax layer.
Repeat, one panel at a time for the rest of your car.