I'm pretty sure the only reason glass is a blast media is to do something with old bottles and jars. Its pretty much a one-time use media but if you're blasting outdoors and can't contain the stuff then just about anything is one-time use.
Ideally you want a very hard, sharp, small media. Small, hard and sharp will cut like crazy and get in small places and will leave a nice finish. Aluminum oxide pretty much tops the list but its expensive - great for use in a blast cabinet.
Unless you have a commercial blaster setup, you want smallish media so you can use a small nozzle - otherwise you need BIG air. The bigger the media the greater the chance of it clogging the nozzle - and that's just a pain in the ***.
What sort of blast equipment do you have ?
Whatever you decide on, be absolutely sure to wear a decent dust mask.
Back quite a few years ago. I worked at a Helicopter refinishing shop they had a media blasting room that used plastic beads. In a graded room for doing tail booms ,
Guys used to take there cars there and get them done. Then the mess was recycled back through the system.
Great to get the finish off but not destructive to hurt or warp panels.