I'll be able to let you know something in a few weeks. I had mentioned that we traded in the wife's G37 which was doing really nicely with DGNCC.
That car was coated in April of this year and was traded in, August of this year. During that time I did not mess with it at all. It had two coats applied in 70 degree weather and behaved beautifully. The beading and sheeting was really good, the car cleaned up easily and even bird poo didn't stick.
It's important for me to reiterate that I did not top it with anything. It was washed, dried and left alone.
I just coated my car...done the same way as the wife's old car. Two coats applied 24 hours apart, after claying (nano skin actually) polishing, and 2 IPA wipe downs. The wife's new car will be done soon (not exactly sure when) but I'll report back with how my car is doing in the coming weeks.
Stay tuned....