How to clear clouded headlights on 1991 Volkswagen Passat

The outside of the headlight glass has clouded over the last couple of years. Can it be cleaned?

Asked by for the 1991 Volkswagen Passat
Meguires make good cleaning products to clean the lens. You can get a product you apply like wax and take off with a cloth or a product that requires using a buffer. Any auto parts store wil have it.
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ordinary brasso works wonders