ACK! Dang birds!

I washed my truck today. It wasnt all that dirty, but ya know how one's Titan has to be nice and clean so i washed it.
but, WTF! i rubbed off a couple bird bombs that were on my hood, but theres still a slight "blueish" stain mark on my nice Black hood.

this is the first time ive had this trouble with bird bombs. I always remove em as soon as i see them. but this bird must of had some mad radioactive crap!

whats out there that can remove stubborn bird bomb stains? help please...