Sand blasting is a process by which coatings, residue, paint, or other unwanted finishes are removed from objects using sand or other abrasive material under high pressure. The pressurized abrasive strips the coating off or “blasts” away the dirt, residue, or other stains.
Soda blasting is similar to sandblasting in that it uses an abrasive material under pressure, but the sodium bicarbonate is less abrasive and less aggressive than sand or other abrasive materials. The sodium bicarbonate granules shatter upon impact with the surface, removing the unwanted material from the surface and leaving behind only water-soluble soda and an alkali film that can be easily removed. The soda, a natural deodorizer, also helps with the smells left behind by soot and smoke after a fire.
Soda has an advantage over sand or other abrasive materials in that it is more environmentally friendly—it shatters upon impact and is washed away with whater.