The result is very good, and I applied it quickly. It requires patience when sanding with sandpaper without rushing, they will become like new

For a light case, it will perform to the maximum.
I had a heavier case and the materials were not enough for me.
There will be improvement in any case.

I gave it one star because it doesn't do what it claims, it's a lot of work for nothing. The result it produced was only 10 to 15%, I wouldn't buy it again. I am knowledgeable, I am a professional, I tried it and it doesn't do the job, it's a waste of the 20 euros I spent on it!

I, who tried the product on my light yellow headlights from 2011, cleaned them with sandpaper. BUT, guys, when you clean them, you have to seal the new material that has come out on the surface of the headlight in some way. The fake wipes that it has inside DO NOT WORK UNDER ANY CIRCUMSTANCES. It lasted for 3 weeks for me and then they started to turn yellow again. DO NOT WASTE YOUR MONEY, get 3 water sandpapers 800-1000-1500, sand them and then buy a 2k transparent varnish and apply it on the headlights. It is the only thing that will last at least 1-2 years and it will cost you around 15-20 euros again.

I bought it with minimal hopes for its effectiveness, as I wanted to restore the headlights of an old 18-year-old Santa Fe with extensive oxidation (they had never been restored before!). They had yellowed to such an extent that you couldn't even see the inside of the headlight. Well, I'm here to tell you that it made them look like new!
I only have one comment to make (and that's why I give it 4 stars). I wish the sandpapers included in the kit were a bit more durable. So, do what I did. If your headlights are yellowed, don't use the kit right away! Go to a local hardware store and get your own fine-grit sandpapers, ranging from 1,000-1,500 and above (known as wet sandpapers, costing around 0.3 euros). Take a bucket of warm water and sand your headlights until about 80-90% of the oxidation is removed, and then use the kit to address any scratches and imperfections that you couldn't remove with your own sandpapers.
In the end, we're talking about a very good product that, for the price it asks, completely changes the appearance of your car.

It simply makes the lantern like new... The best and very good price... Car 15 years old and in 5 minutes the lights became new...

Guys, I hadn't cleaned my car's headlights for 3 years, and a friend recommended me this product and I can say that it does a perfect job, it's worth every penny of its price 100%, and it really makes the headlights shine!!