The simple sandblaster I made earlier had the drawback that the nozzle was easily worn.
Therefore, I considered a mechanism that can be easily replaced by using a ceramic nozzle that is advantageous in wear resistance.
It can be made for approximately $ 20, including an air blow gun and ceramic nozzle.

Click here for parts list
(You can access it by entering the 7 "keywords" displayed in the video.)
https://jisaku-koubou.com/sandblaster