Abrasive blasting is the operation of forcibly propelling a stream of abrasive material against a surface under high pressure to smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants.
There are several variants of the process with using various media. Some are highly abrasive, and others are milder. The most abrasive are shot blasting (with metal shot) and sandblasting (with sand).
Moderately abrasive variants include glass bead blasting (with glass beads) and media blasting with ground-up plastic stock or walnut shells and corncobs. Please, Note: some of these substances can cause anaphylactic shock to both operators and passers by.