I used to repair scratched CDs with car wax. The wax fills in the microscopic scratch marks and buff to a shine. Sometimes, I had to use a cotton-tipped applicator to rub the wax into the scratch so that it would be completely filled in. Visually, the scratches disappeared. And the previously unplayable scratched CD could at least be played long enough for me to make a copy. Car wax might work with laptop screens as well.