I had used Klasse AIO/SG on this black BMW 740iL about 6 weeks ago. I then decided to try NXT on this same car 6 weeks later. No prep was needed, just applied NXT.
I tried to get the angle and hopefully the sunlight the same, but when it was 6 week prior that I took the first picture, it is hard to remember exactly how the car was angled. Anyway, both days were sunny, so the light was similar...at least as close as I could get it for not being in control of sunshine.
AIO/SG:
6 weeks later, NXT only:
The NXT version looks slightly 'blacker' to me, but that could be the amount of sunlight as much as it is the product. Just shows how hard before and after can be.
I tried to get the angle and hopefully the sunlight the same, but when it was 6 week prior that I took the first picture, it is hard to remember exactly how the car was angled. Anyway, both days were sunny, so the light was similar...at least as close as I could get it for not being in control of sunshine.
AIO/SG:

6 weeks later, NXT only:

The NXT version looks slightly 'blacker' to me, but that could be the amount of sunlight as much as it is the product. Just shows how hard before and after can be.