Windshields are difficult to repair regardless of the problem. It takes patience and planning, a deep understanding of the process involved, and a realistic expectation of the outcome. The improvements may definitely be made, but restoring the damaged glass as a new one will have a highly unlikely quality. With this in mind, there are several processes that can be used to polish the blasted glass. Very worn glass should be replaced.
- Rub the windshield with a nylon bristle brush. Use a liquid detergent. This will remove any oily residue from the glass and clean the corroded areas of any particles that are trapped inside them. Wash the glass with water.
- Put on safety goggles and gloves. Apply a commercial polishing compound to the glass and start polishing using a variable speed drill set at the lowest. Most compounds contain cerium oxide as an abrasive. This will remove the entire area around the hole from the glass. As it will be removed, some pieces will begin to enter the hole and give a false impression of being uniform. To avoid this, constantly wash the area by lightly squeezing a sponge moistened with water to keep moisture in the compost.
- Rub the area with a brush and liquid soap again to remove the compound used and clean the corroded areas. Dry and inspect the polished site. Apply more compost and start polishing with a drill bit, keeping the area moist. Do not let the compound dry out as this could cause undesirable risks. Dampen continuously with a small stream of water along with sponge. Repeat this process until you get satisfactory results.
- Clean the glass for the last time and apply a rain repellent formula available at auto parts stores. These fill in small surface imperfections, enhance the appearance and add enhanced viability. They have the advantage of repelling water by reducing windshield wear.