Their is a popular yearly festival for Hari Krishna in Utah that I've attended with the same color powders being thrown everywhere. This stuff is TOUGH to get out. It stained my clothes and shoes permanently and took about 4-5 showers to get it completely off my skin. I can't say whether it would stain a base material or not, but I would say you would for sure have to do a de/re bond right after. This stuff would def get into the glue and might look really weird. Are you allowed to wear a doorag/hankercheif type thing? That might help. But if you go, seriously wear clothes you don't care about, I mean this stuff somehow even managed to stain my underwear. And yes, you will be blowing purple goo out of your nose for about a week.

http://www.youtube.com/watch?v=zqsRFAJVN9c