Proper air pressure for glass etching using a sandblaster in Engravers Posted July 19, 2018 What’s the YouTube video with the modifications? On 11/22/2017 at 11:38 AM, Hurricane Mark said: I am new to glass etching and I am using a sand blaster. The $180 harbor freight blaster with the modifications you can see on youtube. I lso have a Dust Deputy and a 5 gallon shop vac. I have a 26 gallon craftsman air compressor. I am using 80 grit aluminum oxide blast media. I am blasting onto glass mugs and using 651 vinyl for my designs. I have yet to find a proper answer for this after searching the internet so I joined this site to specifically ask this question: What air pressure should I be at with my air compressor to do this glass etching?