Hey all, just thought i might start this thread up again and share my experience instead of creating a new topic (thanks to dan_the_man for the suggestion)
I'm sure most of us have gone through the oxidation & clouding issue with the front headlight's of a skyline. Ive always noticed it on mine have been too lazy to do anything. I know others though are more particular and like to nip these little issues straight away.
I used exactly the same method as INVRTD did back at the top of the thread and am just sharing my results with you guys; with a few subtle difference.
It didn't take all that long (probably a solid 20 min both both headlights). I applied the PlastX about 3 time's on each light. The first time was to get the general dirt, grit, residue and oxidation off. The 2nd pass concentrated more on the stubborn stains and light scratches (this was the most time consuming since u have to look for what you missed). The 3rd pass was to get the excess polish off while it was still wet.
Each time i applied the polish with the applicator pads and buffed it clean with the microwipe cloth.
Just a note, it's best to do this out in the direct sunlight since u have better visibility.
I cant guarantee that this method will work for you, but again, im just sharing my experience.