Sand Blasting Machine is a way of smoothing and cleaning a hard surface by forcing solid particles on the surface of the workpiece at high speeds by using compressed air from the air compressor. With aggressive blasting, the sand moved against a surface. With shot blasting machine on the other hand, steel shots or glass beads are propelled or moved against a texture. The beads are often made of stainless steel shots, copper slag, aluminum oxide grit, or zinc. In this case, all of these metals are harder than sand, making shot blasting even more effective than its aggressive blasting equivalent.