In no particular order, I use FK425, Aquawax, Surf City Speed Demon, Surf City Hot Rod Detailer, Duragloss 921 FC&S. I've not tried the other brands mentioned but I'm sure they're winners too. I bought a gallon of the Chemical Guys Extreme Slick Synthetic as my first QD. Once I tried AW and FK425, I gave the gallon to a friend. Not impressed.