You no need to buy expensive liquid or foam to repair scratched discs. All you need is just toothpaste. Yes, I said toothpaste. With the toothpaste, you can fix the scratches on the discs and get the shiny back.
Here how you can do it by yourself to repair the scratched discs.
1. Put toothpaste on the disc surface.
2. Apply the toothpaste all over the scratches.
3. Rinse with water.
4. Dry it with clean cloth.