Foggy Headlight Lenses
I purchased lens covers from Weathertech. Before putting them on, very lightly sanded the headlight lens with 3000 Emory paper removing the oxidation. Then I installed the cover, liberally using a Dawn and water solution and a plastic squeegee sent with the cover. As the solution under the cover dried, the lens cleared.
I bought Weathertech alcohol solution and soap solution, save your cash. Wipe the lens with drugstore alcohol and make your own solution with dish washing soap. I ended up not using their stuff, wasted money.
Before I started, I took a small piece of excess cover material and tried this method out on a very small, dime size, place toward the edge of the lens. After having it on for a couple days, I was satisfied and now Mrs CMD's Rave4 has clear headlights once again. I will be a hero after her first drive at night.
You can also get the covers from Lamin-X.