If you have black, you know exactly what I'm talking about.. If it doesn't dry, it looks like ghost flames where you can actually see the motion you made while putting the wax on. What a nightmare.. The Zaino fusion does a good job of taking out the swirls, if you use it with a porter cable.. Do not apply by hand.. it will make more scratches than it takes out. If you like the old Zaino, try the meguiars #21. It had some similarities with the old Zaino. As far as durability, I don't know just yet.. I used it on my wife's tahoe a few weeks ago, but so far I really like it.. I haven't used it on black, which is the real test. Check out autopia.org. That website has everything you ever wanted to know about detailing and product info.. I learned a lot over at that forum. Anyway, hope that helps..