I posted recently comparing Nanolex to Permanon 4 months after application here:
Given a spate of really wet whether recently I took this opportunity to take a photo of my bonnet from dead centre after teh car had braved the weather. The left hand side of the above photo has been treated with Nanonlex 4 months ago and the right Permanon also 4 months ago. Today, as you can see from from the photo, much of a muchness. No real discernable difference.
The next challenge I have set myself when it comes to detailing is paint correction! More on that very soon, so stay tuned as I think there will be plenty of learnings.