My 2000 Accord had 1 headlight lens that had yellowed. It was driving me nuts.
All the repair methods involved abrasive creams and/or sandpaper. I thought before I spend more money why not just try some rubbing compound and scratch remover that I had on hand.
I use some 15-20 year old Turtle Wax rubbing compound on the light and the follow-up with Nu-Finish Scratch Doctor.
Just buffed it with a cloth and the results were great. I knew I was taking the easy way out on the fix but was I ever surprised and please with the results. I would say 95% of the yellowing is gone.
The difference between the 2 headlights was very evident and now they look the same. Sorry I have no before pictures so after pictures are pretty meaningless.
So before you go out and buy another product just try what you have on hand. Thought I would pass along my experience.