If your glass is actually chipped – meaning a circular-ish hole is knocked out of your glass, then resurfacing is very UNLIKELY.
Scratches, even deep ones are really very tiny, even though they seem deep just looking at them. However, once the sanding process begins, the actual amount of glass removed to get to the bottom of a scratch is practically insignificant. A chip, however, can even go completely through the glass, leaving a tiny opening to the other side.
In cases of a chip, you will likely need to replace the glass, or it MIGHT be possible to repair in the same manner as vehicle glass chips are repaired.