The Lincoln Mark VIII's were notorious for burning out the reflective material in their headlight housings. Back when I was big into those cars, I would remove the headlight lens by baking it in an oven, then I would apply ChromeBright TrimBright tape to the inside of the housing and seal it back up. The chromebright tape resisted the head of my HIDs and it is as reflective as a mirror. I used to get a roll for about 6 bucks and O'rielly Auto Parts. Just my 2 cents.