How do you fix a scratched Wii U disc?

How do you fix a scratched Wii U disc?
Repair using Toothpaste

Clean the disc with a mild soap and warm water.
Dry the disc with a lint-free cloth.
Apply the toothpaste on the disk.
Rub the toothpaste on the disc in a straight motion (not in a circular motion) from the center to the outer edges.
Let it sit for 2-3 minutes.

Repair using Toothpaste
  1. Clean the disc with a mild soap and warm water.
  2. Dry the disc with a lint-free cloth.
  3. Apply the toothpaste on the disk.
  4. Rub the toothpaste on the disc in a straight motion (not in a circular motion) from the center to the outer edges.
  5. Let it sit for 2-3 minutes.