To my understanding, you put any colour you want underneath (My best friend, Savannah put a really pretty electric blue on), and put this black nail polish that peels away leaving that scratched effect! It looks really cool... but I am not sure how long I would be able to go without picking it off! :)
In recent news - I GOT A JOB TODAY :) I am now an optometrist assistant... I get to poof air into people's eyes! Score!
Have a great week!!!