I don't rate Gtechniq as very good. I put the their best products at the time on when I had my car new ready and prepped, and and ended having to remove everything and go with a different brand that actually worked. Adam's Polishes is also another brand I would stay away from - cheap and doesn't perform.
I would recommend the following brands: CarProUK, GEYON, ArtDeShine, Ethos Car Care (USA based). SOFT 99 also have some good products.
These YouTube detailer /reviewers have a lot of good advice - Car Craft Auto Detailing and Apex Detail. They test all the best paint protection products
Although Paint Protection Film (PPF) is the best of all! Front half of my car has it - highly recommended!
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