BLASTING TECHNICAL INFORMATION MC FinishingRemoval of weld discoloration Heat treat mill scale removal Surface cleaning Weld splatter removal The suction systems work fine and can be continuously blasted as long as there is blasting media in the hopper Suction systems do not deliver media well at very low air pressures 5 to 25 psi and they have limits on how long the suction feed hose can be Very heavy blasting larger steel