my sandblast cabinet has been zapping me occasionally, mostly when i hold a part in my hand while blasting it. I duct taped the screws on the gloves which were the typical spot it attacked. I didn't pay too much attention to it. Cecil commented that he has the same issue, after seeing my duct tape job.
My son, Dave was over blasting some parts for the HD-5 crawler in the shop, and he got zapped repeatedly. well, after a little on-line checking, he said, ground the gun, its the media passing the gun that's creating the static.
I did it several weeks ago - the result - no more static discharge!
Mods, feel free to move this, but leave a shell so more people can see it.