I'm really weird about my eyes ,I don't know if I could deal with spraying it. But it sounds awesome. I wouldn't even go near it untill it's approved in America, or FDA.
But then again, I wear contacts every day, so I'm fine with putting in colored contacts (although this would be cool, because I don't have enough money for prescriptioned colored contacts, so we'll see. lol)
But yeah! It looks pretty cool if it really works. ^^ A great alternitive for cosplayers with issues involving contacts and such~