The other day I picked up a Rain-X Headlight restoration kit from Supacheap Wollongong. I used it on the sisters Foz which worked a treat. Surprisingly they don't keep it in the detailing products section, it was in the section with all the other rain-X stuff. The other brand I have tried is the Turtle Wax headlight restorer and it looked good for a while but became yellow a few weeks later. And the worst part is that the sealant in the kit was a cloth which could only be used once, whereas in the Rain-X kit there's a liquid sealant a bottle.
Comparo pic:
