On the panels, the line around the chipping was etched deep. This helped control the chip line.
This was the sequence.
Do stencil process and sand blast. Strip and clean the glass.
Apply clear contact. (Contact paper was better then than it is nowadays)
Use deep etched outline to trace cut and remove Contact from areas to be chipped.
Use squeegee to float glue over entire pattern area.
After glue gels, place the panel in refrigerator to further chill the glue. Cut and roll excess glue off Contact covered areas (like Teflon) using X-acto and return this gelled glue back to glue pot to be used again (saved a lot of glue and time this way).
Any glue that creeped under the Contact I learned to ignore as it wouldn't chip because it couldn't dry. The second chip was done the same, squeegeeing another application of glue over the existing Contact paper and so on.
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