lol, its easy mate but takes time.

wash the car properly to get it nice and clean,then work a quarter of a panel at a time,cut the clay bar into 3 and take one part and roll it round to a ball then turn it to a flat disc as in my pic.
you have to keep the clay as soft as you can or it will go hard and mark the paint rather than remove contaminants. spray the quick detailer on quarter of the panel and the clay before gently rubbing it across the face of the paint,once you are satisfied with the finish and its smooth roll it in on its self and then reflatten it to give you a new fresh disc to start. wipe the panel dry and do the same for the rest of the car,pay particular attention to the lower doors and rear bumper where tar collects.

and this tme of year i find it best to have a hot pot of water to put the clay in between goes.it stops it going hard then

neil