Adams Polishes. For few last years tried different brands and ended with this brand. Mega Foam shampoo, two buckets method and quick detailing spray for drying are the best way to keep my GT shine and clean.
Although you can get some good information off the internet and from Youtube review videos, you have to be really aware of the credibility of the source. For example, there are some very slick websites that look like legitimate reviews, but they are in fact paid advertisements, sorta like infomercials.
I like and respect ScottHD reviews of various products. He clearly states that he does NOT accept payments from manufacturers:
I choose products that 1) do what they claim and do it well 2) are pleasing to work with and 3) are decent values. I also like to buy small bottles of different products and base my decision on my own actual experience.
I base my decisions on if it’s easy it “probably” won’t last. Took me 2 days of prep and a day of application of CQuartz. Did this 18 months ago and it’s still there on my DAILY driver. But I do take care of it. I went with Carpro because its a professional coating with great reviews.