It can save a bad mani!
On Monday, I painted my nails with Lancome's Violet Groove, and I hated it! The polish was thick and goopy, which no new polish should be, and the purple cream polish did nothing for my skin.
So I grabbed my bottle of China Glaze Fault Line (sent to me for review purposes) and volia! Much better!
But with a coat of China Glaze Cracked Concrete (sent to me for review purposes), it was instantly cooler!