Let's talk watermarbles. Messy: check, wastes a ton of precious polish: check, can be disastrous: check. But PLEASE don't let this deter you =p. All the work and time to perfect this technique is really worth it. Plus, I've found that cheap polishes like Sally Hansen and Sinful work wonderfully. My love of polish began after receiving a random eblast from All Lacquered Up's first attempt at this nailart technique from a beauty website. After reading a bit more about it and watching countless how-tos on YouTube, I was a full on addict.