SAND BUDDY

Life can be a beach, unless you live on one. Then you need to take advantage of the Sand Buddy. This is not an original, but I couldn't pass up the build. Start out with a $5 (Harbor Freight)  air gun nozzle with tube. Clamp the tube into your vise and file ~ 1/2" length until it is half way through the tube.

I used a Nutra-Sweet bottle, but any small, sturdy neck plastic bottle will work. Get a bit the same size as your air tube and drill a hole through a thick part of the bottle's neck. Be sure the cap has adequate room to be put on and off.

Insert the filed tube through the hole in the bottle. Align the tube so the filed space is facing the bottom of the bottle.

Use something like a glue gun to add a seal to the outside of the bottle/tube junctions. You will probable still need to hold onto the bottle to keep it upright, speaking upside down on the air gun tube.

I tested the Sand Buddy on a rusty metal chisel. Here is a before and after picture.

I used some masking tape to create a stripe on a glass jar, and then I blasted between the edges of the tape. This was a nice, clean and quick etching.

Sand Buddy will need to be powered by at least 40psi of compressed air pressure. My tank was set to around 100psi.  Be sure you aren't aiming the tube towards anything you don't want scrubbed. It is a good idea to wear some glasses, sand bounced off the garage floor when I was experimenting.

.