Make Your Own Sandblaster And How To Use It 3 Steps
The setup is a normal air gun, with a hose at a second attachment. This sucks in sand at a constant rate, via Bernoullis Principle, like an aspiration setup in a chemistry class. Find a bucket of sand for the hose to rest in. Find some good method to keep the hose submerged in sand, like duct-taping the hose to the side of the bucket so that its always pointed downwards.