Tempered glass will explode when cut with standard methods. Do they use a special process to cut the pieces you purchase? The local glass shop to me says they won't touch tempered unless it can be ordered in exactly the size I request.
Even though this thread has been quiet for a while, I'd like to add something that may be of value. I don't own a sandblaster cabinet, but am lucky enough to use my friend's shop two-man box. He was lamenting the cost of the window liners and I simply accepted the fact as a cost of operating.
A...