craftgrrl | removing fabric paint?

i've got a pair of overalls with fabric paint on that i'd like to take off, but i'm not sure how to go about doing so.

sadly i don't know what the overalls are made of - something synthetic and a little heavy - and i don't know what kind of fabric paint it was, but i do know it's the kind that comes in a little bottle with a teeny nozzle that you use for crafts.

the paint is on pretty thick since it was used for lines and wasn't spread. i'd rather not ruin the colour of the fabric, but i figure i'll probably have to. i'll just paint over the spots if it comes to that, so -- ideas? give me your worst! ;D

thanks!