My headlights where very yellow, and made my car look ugly. I use Novus Plastic Polish No. 2. It works great and is only about $5.75 for a 8oz bottle. I think they sell it at NAPA. It works wonders, it made my headlights look brand new. I put it on my moms headlights and they look brand new also. Hers we so yellow that she had to drive with her highbeams on and still could barly see. This stuff works great and is very cheap. Hope this helps you out. I have before and after pics, just email me at
whoppalulu@hotmail.com to see the results.