Dustless Blasters work by adding water inside the blast vessel with the abrasive. This increases the mass of the abrasive, significantly reducing consumption. Think of how powerful a wet handful of sand is compared to a dry one. Secondly the water atomizes, or vaporizes. This eliminates any type of airborne particulate from the abrasive or the coating being removed.
CLICK ON THE IMAGES BELOW AND SEE HOW DUSTLESS BLASTER WORKS ON A 61 FOOT YATCH