Warped is hot but Warped is messy so do not wear nice-ish clothes or whites (you can if you want that's up to you) I wear mostly blacks to Warped because you can definitely get away with having something poured on you and NOT stain.
There's beer, Monster (which stains depending on which flavor), and blood (and the occasional vomit).
Yes, blood this year if you're planning on checking out GWAR in white anything stay far back from the blood splash zone, they spray blood at their shows, also moshpits get bloody sometimes so there's that too.

Just remember, stains.

-or maybe I'm just a pussy but I don't want blood staining me I got shit for blood stained shoes as a first year student.