I was called to Boulder to look at two large sliding window wall panels in a new custom home.
One panel had 15 or 20 scratches and was easily repairable.
The other panel had several hundred scratches on it, and the builder decided to replace the panel due to the large amount of damage on both sides.
It took about 8 months for the replacement panel to arrive, since the glass was made in Italy and had to come over via shipping container. This was a very expensive piece of glass, triple glazed 10mm glass.
When the glass arrived, a crane was needed to move the panel into the back yard, due to the size and weight of the panel. As the panel was being set onto a rolling cart to move it to the installation area, the panel hit the cart and broke into a million small pieces of tempered glass (as seen above).
I then went back and spent several days removing the hundreds of scratches from the old panel.