Ladies and Gentlemen:
I am in the door business, have been for 30 years. FYI ALL glass doors are required by Federal Law to have tempered glass or the equivalent (wire glass can substitute). Any glass that is located in an opening that is less than 18" off the floor is required by most codes to be tempered. So it's a foregone conclusion that it is tempered.

I have sandblasted tempered glass before with success.

Also, and this may be objectionalable to some, but Oracal, the vinyl company makes a product, that when cut on a plotter and applied properly is difficult to tell from etched or sandblast. If your customer is looking for something just for the look, this is an alternate to set up and sandblast etc. Cheaper too. I have some of this material on a door coming into my house and I get remarks all the time on the "sandblasting". I get a laugh when I tell them it's vinyl.

Harvey, I'm sorry, but, tempered glass can most certainly be sandcarved.

Doug

I was told by a few sand carvers that they would never touch it again.

But I'll take your word for it.

Philadelphia, PA (Really Bensalem)

When you finally understand it completely... it changes.

Dave:
Sqeegee as normal. My wife put this on our door after I cut it and it looks great. Normally an office or the like just wants a number or something small , so it could be done on site. We didn't find it any more difficult than other vinyls.