I gave 2XNXT on my Audi, on top of 3XSG, and the results are amazing, I know a lot of people say that NXT could not be layered, but In my case the second coat of NXT pop out a lot the color and increment the wetter look, a little bit more than the first coat, I wait one week between coats, and I didnt use any pressure, just like you are applying P21s or another wax, great results. My new test is my black volvo, that right now has a coat of UPP, great shine but less deeper than NXT, so This weekend Im going to trow another coat of UPP and then in a couple of weeks 1 coat of NXT and then second coat of NXT, I think the shine is going to be great
In my case the black Volvo look better with NXT than with P21s, of course P21S was alone and NXT was on top of a KSG coat
In my case the black Volvo look better with NXT than with P21s, of course P21S was alone and NXT was on top of a KSG coat