Not if the housings are Spyder cracked on the inside, there is no way to fix that as I heave found. And my experience with wet sanding them or using tooth paste is the yellowing always comes back. Bill

I used the Sylvania kit to clear up the old Jeep lenses, did a few years ago and still holding up pretty good. If I get another year or so, I can live with that. Took about half hr per side. If you want to get really nuts, just get a cheap pair out of the junkyard and do them while you do the ones on the truck and just swap them out in a few years

I work at a GM dealer and I'm pretty sure both right and left headlamp assemblies are still available at about $215.00 each for a 2004 Suburban. If you ever see a vehicle coming down the road with a vibrating headlamp, you can bet it's an aftermarket part.

His original post does not mention anything about spider cracking.

I have wetsanded and clear coated over 10 sets of OEM housings and even at 10 years old for the first set restored they still look brand new on that car - it sits outside everyday all day.

This is not simply buffing plastic.