After I had gotten a silver, black, navy and purple crackle I wasn't really tempted to purchase any others. Then I saw this and thought it would go really nice over black... well that didn't work. The polish isn't as thick as the Barry M and when put on top of a dark colour it just doesn't show up.
It does however show up over lighter colours, such as MUA - Shade 9, or Smurf Blue as I think it should be called! I imagine that it would work over pinks, lighter reds, silver and green. Although they do say 'red and green should never be seen' but rules are there to be broken, right?
7 / 10