The goal is to sand blast several glass panels that are 35" wide by 55" tall then paint the text before removing the mask.
The glass panels were sent to a local company to have a blast mask installed and the text vector cut.
Once weeding of the text was complete an inexpensive means of sand blasting was required.
We built a 13" square box from 3/4" thick PVC and covered the top with clear acrylic after cutting a 4" diameter hole.
We then cut several 8" acrylic disks with a 5/8" diameter hole to fit the blast nozzle. These would allow a 4" radial movement before the box would have to be moved.
We drilled a hole in the edge of the box to fit our shop vac hose and a couple holes on the opposite side to allow air to flow. The vacuum holds the box in place with just enough force to allow it to slide, it also captures all of the sand and dust. The glass beads are recycled several times by transferring it from the Vac to the blast pot.
After blasting we spray painted the text (first picture), the first coat was a khaki color primer, the second coat was Rustoleum Copper Hammer Paint.
In the last picture Art Edwards is blasting the second of four pieces of glass.
You can sand blast large pieces of glass using this technique and the seal is suitable for engraving installed glass.
The size of the box you build will depend on your equipment (vac and blasting pot), you must adjust the box and the cross-vent holes to suit your situation.
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