More ideas from riiina
Love this idea. But a full on green finger is a little extreme and a waste if time to me. I wouldn't do the whole finger in green. Just where I want it to show through.

Paint nail the color desired. Cut 5 very thin strips of scotch tape and place one down the center, with the others next to it. Once the tape is in place, paint the top color and remove as soon as the nail is painted. Add a top coat and you are finished.