Have just purchased my third bottle of Fully Slick and have used it on my 2019 Mazda 3 quite a few times. I love how easy it is to apply and polished off. On my car the results have been outstanding. The depth of shine is fantastic and it creates a finish that means water really beads up and dirt is very easy to wipe off.
Fully Slick has helped my car retain a showroom finish and I highly recommend it anyone who wants to maintain a new car look without a great deal of effort. I do believe though that it will only really work with paint that is already in good condition.