Assuming the paint has been on your hair for several days at this point, I'm afraid you don't have a lot of options.  The paint has cured and has probably entered the cuticle of the hair.

The only suggestion I can think of would be to saturate the affected hair with oil to see if that might dissolve or loosen the paint. 

Glad to hear the rooms turned out well!

I know I am sort of late on this, but I once had a lot of paint in my hair.  Our high school senior class always painted a sign on a night before graduation.  As you can imagine, we wore more of the paint than got on the sign.  I soaked my hair with tons of conditioner and sort of slid the paint off my hair.  I was in the shower a long time, but all the paint came out.  It was in my hair for over 12 hours.