Sand Blaster
This is very easy to make and works very well. I got this idea from the YouTube channel The King Of Random.
What You Need
Supplies: plastic bottle, pen, and an air gun.
Tools: drill, bits, and a knife.
Very Important
You also need an air compressor.
Cutting the Tube
Take out the tube of ink and clean it out. Cut a trench out like in the picture.
Important: the tube needs to be about 3/16 of an inch.
Drill a Hole
Drill a hole in the bottle that the tube can fit in snuggly.
Putting It Together
Put the tube in the bottle with the cut out part facing the mouth of the bottle.
Finished
Fill the bottle half way with sand. Put the air gun and point at what you want to blast and blow.
My air compressor is at 120psi but I don't do full throttle. Just watch the top of the bottle and make sure it doesn't pop up too much.