The best part about crackle polish, for me, is doing a duotone look. It reminds me of leather. Actually it reminds me of this huge faux leather recliner we had growing up. I would hide behind it (while drawing on the walls) and spy on my brother while he smooched his girlfriends. Great blackmail material since he was dating sisters and they had no clue. *snicker*
This is Barry M Grey with China Glaze Cracked Concrete. I have found that crackle loves thinner. I advise adding a few drops if you are having issues with the polish cracking. It makes a difference.