foggy light covers?

Yoda wrote in news:2009032822592616807-yoda@Dagobahnet:

Plastic headlamp lenses (not "covers") are required by US law to be coated with an anti-abrasive epoxy. It is this epoxy which gets yellow and cloudy with time and exposure to sunlight.

The only cure is to remove the epoxy entirely, then replace it with a new coating.

I've never actually tried the commercial preparations myself, but I understand that, properly administered, they are effective in restoring the headlamps. Auto detailing places often offer headlamp restoration services which involve epoxy removal and renewal.

I suppose you could simply remove the epoxy entirely and just polish the plastic, but the underlying lens may not be optimized for use without that coating. If you want to try this approach anyway, Brasso metal polish may dissolve the epoxy sufficient to restore clarity to the lens. Brasso is excellent for removing scratches on watch crystals and those clear instrument panel covers on your dashboard. A caveat: I'm told that Brasso and other such potions can embrittle headlamp plastic, which may make them more prone to stone fracture. Brasso is available at any grocery store.

Thank you for the wealth of stuff I did not know! Perhaps my headlamp lenses can stay cloudy.