I'd still like an explanation of the difference between Sand and Crushed Glass from a Health standpoint. Sand IS Glass and your Crushing it during the Blasting.
So what IS the difference?
Using Sand as a Media is Terrible. Your essentially Using a thousand tiny hammers to strip with because Common Sand is basically Round/Smooth unless you have a Sharp Sand like used in Swimming Pool filters which does well if you can afford it.
All low micron particulate is hazardous. Some may be chemically inert, but like silica , glass particulates ( in small size) can cause silicosis, or exhibit the same symptoms. There is an undisputed truth here. “ The poison is in the portion “
