1. Glass usually will be hit by the small stones flicked by other car's tyre during driving causing damage to a small area.
2. Glass damaged after car impacted by external force in an accident.
Suggest to repair at car detailing shop or workshop
1. Small area damage can be repair by filling the glass with restoration liquid then use professional equipment to heat it up in order to stick well with the glass. The glass strengthness can reach about 90% of the original strengthness after repaired.
2. Large area damage can only order new parts from the workshop and reinstall new glass.