I've had good results with this stuff. I tried it first a couple of yrs ago on my G35's headlights and it made a huge difference. Used it just yesterday on my '04 RX8, and good as new. You just have to use a lot of elbow grease!

 

I used Plastx on my '04 today. Wasn't quite the miracle product I had been hoping for. I did put it on using a cotton pad, even though they recommend a foam pad, I didn't have one handy nor did Autozone.

Perhaps I need to get out there and really polish hard - though I polished hard enough to blister my fingers today, so maybe that isn't the problem. I kind of want to just throw a really light smoke tint over the headlights and call it a day.

 

I picked up some PlastX last night, after reading this thread. It worked very well. I was impressed. It's not perfect and definitely takes more than one application, but the results were very good. After 3 applications, my headlights went frem very cloudy to very clear. Again, they're not perfect but very good. I'm going to apply some more this weekend and see if I can get them even better.