With some surfaces, a simple cleaning solution just won't do. Media blasting (also called sandblasting or abrasive blasting) has many uses, from removing a layer of paint to deodorizing molded wood beams to removing soot and fire damage. With the right high-pressured system and the right abrasive, this process can produce the end result you need.

Soft vs. Hard Abrasives

Softer abrasives are often better for cleaning, because they can remove dirt and grime with minimal effect on the material beneath. This is especially desirable if you're cleaning relatively soft or delicate surfaces like wood, plastic or machinery.

Hard abrasives remove material more quickly and can be used to create a surface profile, which is a texture of shallow indentations that helps iron, steel and other hard surfaces more easily accept protective coatings. Harder abrasives work faster and create a deeper surface profile. In general, the depth of the surface profile should be at least one quarter of the thickness of the coating you intend to put over it.

Abrasive Shape

Angular abrasives work more quickly and create a crisper surface profile. Round abrasives create a satin or peened finish and are used when no later surface coating is needed. 

Abrasive Friability and Recyclability

Abrasives that break up easily into smaller pieces have high friability. Abrasives that don't break up easily have low friability and are usually recyclable. This means they can be collected and reused via a reclaiming system, usually in an enclosed cabinet.  

This chart will help you understand the differences among many common types of abrasive blast media.