Quick answer
The abrasive media you use determines the cutting power and surface finish. Pick media based on the base material, the contaminant to remove and the finish you need.
| Media | Best for | Finish |
|---|---|---|
| Steel grit | Rust/scale removal on hard metals, profiling | Angular, etched |
| Steel shot | Cleaning and shot peening of metal parts | Smooth, peened |
| Glass beads | Light cleaning, deburring, cosmetic finish | Satin / matte |
| Copper slag | Economical general-purpose blasting | Medium |
| Aluminium oxide | Aggressive cutting, precision, hard surfaces | Sharp, fast-cutting |
How to pick the right media
Harder, angular media (steel grit, aluminium oxide) cut faster and create a profile for coating adhesion. Rounder media (steel shot, glass beads) clean and finish without heavy etching. Match hardness to the base material and avoid silica sand where regulations restrict it due to health risks.