Remove UV oxide from tail light surface

[letsgo]

for $5.00 at SEARS you buy a bottle of flat stove top cleaner (ceran / glass ceramic cooktop) apply a small amount on a damp cloth, hand buff a 2" square for 2 minutes wipe with a wet cloth and dry, you will see an instant change in clarity.

[SoTxPollock]

Mothers headlight restorer or Mequires PlastX will work

[DmaxMaverick]

Soft-Scrub works well. Use Bon Ami or toothpaste for the tough parts, finished up with Soft-Scrub. Be very careful and take your time if you use a power buffer (go real slow with light pressure, or it heats up the surface). You can ruin the surface very quickly with one.