Without buying anything.........hmmmmm, I dont think so. If you have a magic wand around that might work.......Seriously here is the best and most professional way to restore yellowed, cloudy and dull headlights.....I created these videos showing the 6 step technique that I employ for a flawless finish.....Those kits you buy at the auto parts stores could never reproduce what a pneumatic will do.
Hope this helps you....
Dave @ Innovative