I don't remember having seen Casablanca-the-polish before, but it doesn't seem to be a new color, either, as far as I could figure out. It's gray, or rather silver, and SC calls it chrome, but it's actually not. It's not shiny enough to be chrome - it's more like a satin finish. It's an interesting color. I was complaining about it on Twitter that night because I of course had put it on in the car (I guess I could have put it on at work, but that would have been just as much of a pain) and it went on in one thick coat, and I went, "Oh, wow, a one-coater," but then it Would. Not. Dry. Of course it was raining and I'm sure the general humidity did not help. I let it dry for a few minutes and then I went inside, and then I had to go back and fix it inside, because it got all messed up just walking across the street to get inside, even though I was trying to be careful. So I imagine the answer is that you have to do thin coats instead of allowing it to go on in one thick one, anyway. I'll report back after I actually try that.
I picked up that particular bottle of polish partly because I was thinking it looked like a layering polish, so of course when I got home, I went looking for something to layer over it. I looked at the little line of Lynnderellas and I picked out Blue Rouge as being the most silvery - I figured it would mesh with the silveryness of Casablanca. And it did. (I still am awfully crappy at fade manis, though. Practice! I need to practice!)