I have to disagree with you on this point. Here is a link for the 3M website and it shows that it can be applied to the headlight
One thing is what the manufacturer says, and another one reality
. Both shops in Austin and Tucson told me they'd do it on headlights, but at my own risk (no warranty), since they had lots of warranty claims. Both shops don't install 3M's Crystalline tint for the same reason (lots of warranty claims), so thought it was just 3M products. But they don't guarantee their preferred material (SunTek) on headlights either, especially on motorcycles. Finally, we do lots of things to our bikes that are not recommended, or even legal
. So I mentioned that just as an FYI. If you haven't had any trouble, that's good news. But that doesn't mean your plastic is not degraded already. I personally don't do clearbra anymore; just don't see the benefit. It still gets messed up with pebbles. And if you don't clean it after a summer trip, the sun will embed bug juice into the film, and you have to remove it, like I had to do on my last car ($1,500 down the drain). It's all risk vs benefit. Even on the crap infested roads here in the windy desert, I've never had issues with my bikes. Just a small chip or two in decades of riding. My cars are a different story though, but I found out touching up chips looks better than damaged clear film, and don't have to wash the car immediately after a trip anymore. Works for me. On my sports cars, I avoid interstates like the plague, so they're in much better shape than my travel cars. Take care.
Angelo, envelope on its way. Hope that helps.