Any of you guys ever done it. I bought new exterior entryway doors for the house and the glass is not privacy, just single pane clear tempered glass. Privacy glass was more than double and had to be special ordered so I figured I could save a few bucks.
I have a fairly small spot blaster and am wondering what sort of pressure I may want to run and any technique suggestions. I want to get the glass where light will be emitted but people cant see thru.
I am concerned with blotchiness, would like it to appear uniform throughout the panel.
Thanks for any tips

We do some, it's not easy to get it non blotchy, particularly in a box where you can not get very far away from the glass to make a wide spray pattern. For a soft finish, use plain small grain sand, for sharper texture (and faster blasting) you need carbide abrasive.

>just single pane clear tempered glass

**Caution** do *NOT* sandblast single pane Safety glass (Unless you do well at the lottery, there is a 1 in 5 chance it will explode, then it won't be cheaper... )

Be aware that, if t doesn't explode, the safety properties are affected somewhat...

I would , perhaps, recommend an obscure window film....

Thanks, will let you know how I make out, will put some sort of something behind it to absorb some of the blow and hose it down

Rusty, you being a glass guy would prob find this interesting, last post I made tonight........http://forums.aaca.org/f143/1926-motor-age-322803.html

Nice article, thanx
(I have some of those weird materials in the shop ;P)

How big is this glass?
And what is the style of the door/architecture?
If the panel isn't too big I would get some ordinary single sheet glass and experiment.
Try laying out a flower or fern pattern or something on shelf paper vinyl, stick it on, and use an exacto to cut it out. It will make an adequate resist for light blasting.

Cutting a perfect smooth even overall field is a lot less likely that giving your eye something else to look at.
If you like it, (and you probably will) simply mount it in front of your original glass.

It doesn't need to be 100% opaque to stop the eye. Just enough to distract the eye. 
yours Scott   

Find a liquid cleaner that contains sodium silicate.  Spray a coat on & let it dry.
The glass will be frosted.
You won't polish it out either.
That's why 409 changed their formula.

Disclaimer: you have a bad day and frost the neighbor's windshield I never made this post.

The glass is maybe 4 by 6 panels, not looking to make any decorative designs though, trying to find silicate but none locally, would have to be ordered. Prob gonna just blast it, worried about getting any liquid chemicals down into the woof framing.
Will report back

Woks better and is easier than I thought, about 45 seconds per panel, no regulator at 120 psi ( my ceramic tip is in pretty bad shape so I am sure that drops pressure considerably)   Cannot see thru the panels but light is still flowing thru which was my goal and no blotchiness.
Might be two bags of sand at less than 3 bucks a piece. Home run I would say.
Tried it on a picture frame glass first just to see if it would break glass and it did not.

Looking good. Great job you did there.

Looks good, and you won the lottery :)

(It's not blowing the glass into something that breaks it, it's chipping away the edge with the sand that starts the chain reaction within the tempered glass that explodes it)

Back in the mid 80s I ran onto a glass man who was playing with mediablasting on glass.  When the first sign  graphics program came along he got into blasting the coating off the back of mirrors through a mask and spraypainting the blasted area to make decorative stuff.

Glass is an amazing substance in what it will endure.  Unfortunately glass stops enduring catastrophically & somebody gets to sweep up.

Rusty's damn sure right about tempered glass failures.  He hsan't mentioned that it's worth saving failed tempered glass for tank cleaning though.