Alright. Update time. I waxed a different one and let it dry, then removed the film. This way it was a much more thorough test.
Here they are side by side. The one on the right actually has the product applied
Here's the small scratches on the lens about to have the product applied.
And the oxidation that happens to everyone who lives in a somewhat sunny place
VOILA! No more small scratches! (don't mind that rip in the top left, I picked at it before it was completely dry)
And the oxidation is hidden too!
It peels off after some coaxing, but the oxidated portions of the headlight adhere a little better and leave this behind when you take it off. The rest of the lens is clear, and I'd bet my next paycheck those streaks would disappear if you reapplied the film.
Here the small scratches are back after I took off the film.
I'd say if you're trying to protect fog lights, or new headlights definitely use this stuff. If you're trying to save old headlights, this will make them look good until you need to reapply. Which, according to the label is about a year. It doesn't seem to block any light, and you couldn't possibly tell it was on there unless you touched the lens. The only downside is the long drying period (8hrs) that you can't use your truck, or let dust get on it.