How did the Mcguires work for you, i didn't have a lot of luck with it.
Did you use the kit with the sandpaper pads and the buffing wheel, or just the Plastix? The sandpaper process helped make a huge difference on my OEM headlights. I also use the Plastix and the buffing pad on quite a bit of other stuff, chrome grill sections, the plastic covers on my mirrors and even the windows.
The last one I did was with some 800 grit sandpaper, then 1500 grit. Then I used the Plastix and the buffing wheel, wiped it off, and went over it with a cutting compound meant for auto paint and a buffer. They headlights looks almost brand new, minus the moth inside the lens and the small crack.