If you work in a closed shop, and there’s a small opening where the sunlight comes in, then try cutting a fiberglass close to that source light. You’ll see all those glass dust all around you. Multiply that by 1000 times, and that’s what you get with a chopper gun.
If you work with it day in and day out, you might get used to it, but im almost sure that everything you touch will leave some sort of glass dust on it. I know ppl who work in boat industry, who have to sleep on the couch just becoz, the wife cant stand getting itchy from the glass that they bring home. Yes, even if you scrub your body down, you will still have glass stuck to you.
I dont even mix my work clothes with my regular clothes when i do laundry (okay, this is obvious i know). And in my opinion, if you’re working in a that small place like that, you probably dont need a chop gun. And im pretty sure the saving you make in using the gun will be lost in cleaning and getting the proper ventilation set-up.