I'll have to respectfully disagree here.. I've got the following in my garage:
Black SVT
Black MB-SLK
Black Porsche Boxster
Regardless of "paint quality", all of these cars shine as if they came off the showroom floor. You absolutely can't tell the difference. And my SVT hasn't had the luxury of the garage for the past 2 years, so it's had to deal with the harsh elements.
If my paint wasn't so f'd up right now, I'd take a picture off all three to show you side-by-side results. However you cut it, paint is paint. The Germans may put more coats on theirs, but you can't make one car shine better than the other, imho.
** I'm told free samples of the polish will be available in a few weeks.. If you want one, send an e-mail to info@myroadster.net and try it against Zaino for yourself.
