Tznius:
gavra_at_work – i chopped my hair off (not literally its up to my shoulder but compared to the waist i chopped it off).
Not saying that is a bad thing to have done, but many hold (including Rashi, the Magen Avraham and possibly the Machatzis HaShekel) that girls need to have their hair braided, and going out without a braid is a real Issur (Rashi uses the Lashon of “????” – Embarrassing).
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So I ask again, before you are concerned about nail polish, do you have your hair in a braid?