Love when I can find already tried methods! Artifactgirl had a great post on Remove Dark Nail Polish Stains using toothpaste. I opted to just do this in the sink and also scrubbed with a bit of body wash to remove the minty toothpaste.
Still some traces of blue, but much improved! I would have probably continued to scrub with acetone which isn't great for your nails. The least amount of time exposed to chemicals, the better. Cheap and easy enough for me!
