Used Mckees hydro blue and I've got to say I'm pretty impressed to say the least. I have the spray coating too, but when I washed my car the other day, there was a 10% chance of rain overnight and I didn't know how long the coating had to sit before getting wet so I used hydro blue instead and the gloss is pretty nice. Anyone have an idea on how long it lasts? Here's a shot, no editing at all, photo was taken with iPhone 7 plus.