As it was dry this evening I managed to clean the car and try the Gyeon Q2 view. Not sure if I did it 'right'. I think I left the polish on for a bit too long as it took a lot of elbow grease to get it off. When it came to applying the Repel layer, I wasn't holding back on how much I used, but after applying quite a bit to the windscreen and the side windows (front only), I was left with about half a bottle. It states to use the whole bottle for the same!
I also gave the Q2 Tire a go too. Really impressed with how easy it was to apply. As it's a lot less viscous than the Megs tire gel I'm used to using, it was really easy to apply to the whole tyre, especially in all the writing etc on the side. I left it for about 15 mins, even after that, some parts looks a bit shiny, but I buffed it off with a MF as per instructions. We'll see how long it lasts.