I am not a good stain-getter-outer, but I have a friend who swears by Oxy-Clean. She mixes some of the powder in a bathroom sink with hot water, then soaks the clothing item overnight, and she said it always gets the stains out. I would be afraid the writing on your shirt would fade ... but if it's ruined anyways, I guess what's the harm in trying? If you find something that works, please share with us.