The new Eastwood Dual Blaster is the best of both worlds. You can now select the media to suit the job. Switch between soda and abrasive in seconds or mix at an infinite ratio between the two medias. The exclusive mixing valve allows on the fly mixing or selection between the two abrasives and allows you to cut blasting times in half. Use the soda to remove coatings on delicate substrates such as fiberglass, chrome, stainless, etc & quickly switch to abrasives such as crushed glass, glass bead, aluminum oxide, etc in seconds to blast through heavy scale, rust or multiple coatings.This machine is a must for the serious.