Sandblasting is a process in which a stream of abrasive particles is directed at a surface using compressed air or mechanical means. The abrasive particles erode the surface, removing paint, rust, or other coatings and leaving the underlying surface smooth and clean. The compressed air or mechanical means propels the abrasive particles at high speeds, allowing the process to work quickly and efficiently. The strength and size of the abrasive particles, as well as the pressure of the compressed air or mechanical means, can be adjusted to suit the specific surface and coating being removed.