Water marbled nails are so pretty...when they turn out right. Often, they don't. It's a frustrating process and I get pretty impatient and agitated but I love the look so much! Even when it's imperfect, it looks so cool.
The two colors I used (which I think look great together) are Sally Hansen Snappy Sorbet and Essie Mojito Madness. I had A TON of issues with this including bubbling. I'm still very happy with it, though!