Learning how to remove scratches from a windshield can be tricky, depending on the scratches. Light scratches can easily be buffed out, but if your windshield has deep scratches, it will need to be replaced.
Why Fix Scratches?
Like any damage to a windshield, scratches get worse over time. As the glass in a windshield heats and cools during the day and in different types of weather, the expansion and contraction makes scratches and chips deeper. Over time, these can grow into the hated spider-web pattern.
If you have deep scratches caused by flying rocks or windshield wipers, the best bet is to replace the windshield. Most auto policies include windshield insurance that provides a free or discounted replacement for auto glass. Call your insurance company to find out about your coverage before you begin any repairs.
If you're going to try to remove scratches yourself, you will need the following:
Put a quarter-size dab of polish on a dry polishing disc. Set the speed to 1,000 rpm. Polish half the windshield at a time. Start by polishing in and up and down motion, the work left to right. You will need to go over the glass at least four to five times in each direction. If you still see scratches, polish up and down and then side-to-side again. Repeat until the scratches are invisible or barely visible.
Clean the windshield with the microfiber cleaning cloth. To test for scratches and residue, put your hand in a plastic sandwich bag. Lightly run your fingertips over the surface. If you feel any residue, repeat the process.
When one side is completed, repeat the process for the other side. Do not use this method on windshields made from Lexan, clear plastic or Plexiglas.