I've used #26 to top NXT on my black 350Z. It definintely added some depth/wetness, but muted my metallic flake. I ended up topping with NB down the road and I was much happier with the results, wetter and more visible flake. On a white car I'm not sure I'd go either of those routes though since wetness just isn't the same on white and that was the only reason I had to top the NXT. On lighter cars I just go Zaino and top with more Zaino.