Answer: This glass scratch repair kit adopts the principle of repair of “grinding followed by polishing”. Taking the most common type of glass scratches for example, we use 1# grinding sheet for coarse grinding then use 2# grinding sheet for fine grinding; next, we use a polishing pad and water for polishing. When polishing ends, repair is complete. If scratches are more serious, all the steps stay unchanged except that we need extend coarse grinding; if scratches are shadow, all the steps stay unchanged except that we skip coarse grinding; if scratches are more shadow, all we need is polishing. This kitis characterized by simple operation, high efficiency, a good effect, a long life of grinding sheets, and no pollution.