On Sun, 16 Jul 2017 17:16:01 -0700 (PDT), wrote:

If so, which ones do you have the best experience with on Toyota
headlights?

yea, they work for a little while. Then it's back to cloudy again.

Thanks for the reply on practicality of the headlight
deoxidizers/polishers.

How long? 1 Year? 3 months?

I saw that in the referenced articles where there were two types:
- liquid that de'oxidizes (whatever that means, in reality, chemically)
- abrasive (from 2000 grit to 1000 grit) that polishes the surface

Are you speaking of both types?
Why not just put a "wax" on top after polishing?

Some said the wax protects them from yellowing again.
Others say that if such a wax existed, Toyota would have used it.