Break off a piece of clay approx 1 inch square and flatten to the palm of your hand. Work on a 2ft x 2ft area at a time, we area with our Instant detailing spray (or similar) and rub paintwork with flat of clay bar and hand in slow circular movements. Do half the area and turn over the clay bar and repeat.
Rinse off the treated area and feel that glass like finish. Discard the used clay and break off another piece and repeat over the whole car working on 2ft x 2ft areas at a time. Wash and then apply a good wax to your paintwork to protect it.