Originally Posted by
rayray086
1. Buy a pair of plastic lenses
2. Mark the outside of the lens with a circle using a Sharpie where the projector is.
3. Use 60 or 80 grit sandpaper in a circular pattern on the inside where you marked, careful not to wander into the other fluted areas
4. Progress to 220 grit until all deep scratches are gone
5. Progress to 400 grit with water grit until you see a uniform haze without scratches
6. Progress to 1000 grit with water until it looks clear with water
7. Progress to 1500 or 2000 grit and get as smooth as possible. When dry, they should look about like Scotch tape.
8. Use Megiar's PlastX to polish until perfectly clear.