1. I cut the desired oval out of vinyl on my vinyl cutter and we applied it to the glass leaving a 2"+ margin all the way around.
2. Doug then spread some 3in1 oil all around the edge where the glass was to be scored.
3. Then, following the template, he scored the glass all the way around in one continuous motion until he heard the click of his cutter dropping into the score where he had started.
4. After the glass was scored, he turned it over,and with the glass on our carpeted table, firmly pressed the glass, with both his thumbs, directly over the score and furthest from the edge of the glass. He firmly pressed until the glass started to run at the score mark. He then followed the run all the way around the glass pressing over the run but staying back about an inch from it's end. He followed this around until it met up with where he began. The oval was now cut out but captured by the surrounding glass which would have to be carefully removed.
5. Doug then scored the outer margin of glass starting 1/4" away from the oval cut (and perpendicular to the cut) off the edge of the glass. He did this out over the edge of the table and supported the glass with his hand. He then, using some running pliers, carefully and slowly ran the score from the edge of the glass up to the oval cut.
6. He made 4 of these cuts around the glass which released the inner oval from the surrounding margin of glass. Now it's ready for me to drill and do an edge scallop on it!
Doug says, always make sure you do one continuous cut all around the shape, ending where you started, do not over score the glass, and use a minimum of 4 exit cuts to remove margin. ...oh yeah, and a little practice helps.
Denver Chapter of the Letterheads