Having had a good experience with several other Gtechnic products, I wanted to give this a try on fairly new trim. I have a bed cover on the back of a 2021 Honda Ridgeline that is going to be up against quite a bit of UV exposure in the south. Honestly I was surprised how it was able to add richness to basically new trim, adding just a bit more darkness.

C4 is effortless to apply and allows for abundant working time. To help make the product go farther, I "procured" some of my wife's make-up pads. The don't hold as much product and that way you can keep the nice Gtech one for another day.

Similar to other's comments, I've tried a wide variety of trim products and cleaners. I especially like not having to remove the streaks that oil or silicone based products leave on the paint after it rains. Would have liked to have tried it on weathered trim. Using a Mr. Clean sponge on old trim works wonders for turning it black again. Make sure to tape the adjoining painted surfaces. Coating it with C4 at this point should make a big difference.

IT worked "ok" - 2007 Corvette ZO6, was recommended by the business that did the ceramic coating. IT did "black" most of the trim that I put it on, The front fender wells were definitely "grey" and after the application were a "darker grey". Second application made no difference. When compared to a spray on product that my mechanic gave me that e uses on his show and race cars (17.99) could tell no immediate difference.
It is my hope that the difference will be in the longevity of the product, vs the immediate result.

I most recently used C4 on a 2019 Toyota Tundra and the owner was amazed at how the plastic trim looked! I see this truck on a monthly basis so I will be able to test the durability of C4. The application is super easy and the results are phenomenal! This is by far my go-to coating for exterior plastic trim.