I painted my nails first with CND Blackjack and OPI Alpine Snow. I added a top coat of Seche Vite and let it dry BEFORE adding Cracked Concrete. Some people find it easier to use a crackle/shatter coat on wet (or slightly wet) polish, but I find it better over dry.
As you can see, it crackled nicely! I used a thin coat that covered the entire nail in 3 swipes and this is what I came out with.
It's a lot like China Glaze Recycle for its base color. No yellow tones (yay!) and no red tones (yay again!) but just a nice grey.
Indoors with the flash - not much else to say here. :] If you're into grey cremes, I'd say get it!
China Glaze can be found online through several etailers, including my favorite Head2Toe Beauty, Sally's Beauty Supply, and TransDesign.
Disclosure: The product[s] in this post was [were] provided to me by the company for consideration. For more information, please read this post.