Need help cleaning my adidas superstar 2 shoes?

I didn't wear my adidas shoes for awhile so its still kinda new the leather parts are clean except for the shell toe area and rim of the shoes got yellowish-green and i can't get it off. tried bleaching it and it turn more greenish..now it looks like piss on my shoes. Whats the best way of getting that greenish stain/coloring off the shoes other than buying another one.|||try magic eraser?