Various techniques are used in paint spraying. One of the most famous is the "Airless" technique. Airless literally means "without air" because (as many people think) it produces very little overspray. In fact, the paint is forced under pressure through a small hole (spray tip), so an airless sprayer is not actually "airless".
Proper paint surface preparation is essential for a good result. There is no difference between preparing for spray paint or regular roller paint. Here follow the main preparation tips for spray painting.