100 Series headlights

Gday Munji
If you go to Utube and have a look, they show you how to polish the lenses . I did mine some time back and they are ok. Still a bit yellow , but better than before.

You can buy the polishing kit from Autobarn or similar for about $29 A lot cheaper than a new light assembly that Toyota quoted me at well over $300.

If its on the inside will be a bit more of a problem

Has that Lens been replaced?

Munji - A mate insists the treatment outlined below, works like a dream on cloudy acrylic lenses.

I haven't tried it personally, I have only just acquired one vehicle with acrylic headlights, all the rest are glass headlights.

1. Using a trickling water source along with 1000 grade wet-and-dry emery cloth, sand the damaged face of the headlight lens, back to a smooth matte finish overall.

2. You will notice a yellow scum on the lens, wash this off, rinse the lens face until perfectly clean and let it dry thoroughly.

3. Acquire a spray can of White Knight Clear Top Coat. This is the acrylic varnish used to top coat polished brass and copper to prevent dulling.
Carefully spray the sanded lens with the Clear Top Coat, taking care to spray on an even smooth coating.

4. Allow to dry, and you will find the finish is as good as new acrylic. According to the mate, the treatment lasts at least a couple of years, even in constant strong sunlight.

Cheers, Ron.

If it is the usual acrylic with U/V clouding, have a look at Eric The Car Guy's video https://www.youtube.com/watch?feature=player_embedded&v=fvNSjjTHua4 which is one he did. Obviously you don't need to use that kit, but the method/technique is the same.

Or Kitten no1 polish and elbow grease !

I remember using toothpaste to clear a headlight some years back, may have been an xf falcon lens...

Just use a good quality car polish.
I used Maguires Wet look once and Mothers on an another occasion.
Both got rid of the cloudiness and lasted for a couple of years before needing it again

toothpaste on a damp cloth works good

then make sure your headlight globes are uv cut