coating for headlights?

Pledge. Really. But with salt you'll have to apply it once a week or so.

Makes sense, I will have to try it. It is the shiznit for brushed stainless kitchen appliances.

nate

Maybe some spray on Pam?

Pam, at the Goodwill store, she would say, What? cuhulin

This is a little different than what you're asking about but after trying meguiars wax, which only worked for a couple days or so for some reason, I've found that non-detergent motor oil works GREAT for extended period to render aged, foggy plastic headlight covers clear again and even with the slight amount of dirt it attacks/holds, it certainly remains much more transparent than no treatment at all. I was initially concerned that it might attack the plastic, but after months of treatments, that hasn't been the case. Just thought I'd pass it along.

Not even going there!! ;)

Pledge or generic version of same. A GOOD wax job helps but about the only way to keep them really clean is a washer jet and wiper. I put a simple jet system on the Caravan I drove for work. Just used a pair of nozzles from a spray wand mounted to tabs of aluminum. Ran a T off the factory washer line. The nozzles were selected because they had a round spray pattern.