what works realy fine on delicate or any clothing is fabric softener... wet the part of the clothing with it and after lets say 10-15 minutes the paint will melt to a butter like consistance and will come off like magic in your next regular laundry. If the latex or acrylic paint has dried for many days it could take a second treatment like this. But I assure you acrylic or latex will melt and wash off.
Have a good day