I only knew they made a compressed air version.
The only blaster I ever used was a pressurized tank version.
The air one you bought relies on the venturi/vacuum effect at the sand and air flow junction.
I would get me a bag of blasting sand and put some in a 5 gallon bucket.
Keeping the sand as dry as possible is a big issue. Maybe a light bulb down in the sand or an electric charcoal starter? Keeping the sand warm and dry.
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