Tznius, Winnie the Pooh & Takamamash – Good question about the nail polish. To clarify, I didn’t assume. As soon as I realized there might be an issue, I asked someone. I was told that if I would be uncomfortable going to a wedding that way and would remove it first, it’s considered a chatzitza.
My understanding is that for girls who normally wear nail polish, it is only a chatzitza if it is cracked. When it is not cracked, they consider nail polish to be a normal respectable thing to have on your hands, so it is not a chatzitza. At the time, for me, nail polish (in any color, and certainly if it was blue), was not something I normally wore and I did not consider it something normal and respectable (I was only wearing it as a “Purim costume”), so it was similar to the cracked nail polish of a girl who normally wears nail polish.