Scrape off as much paint as possible using a dull knife.
Turn the garment inside out and flush the stained area with warm water. Turn the garment right side out to treat the stain with a cleaning solution.
Blot the stained area with a sponge dipped in a 50 percent liquid dish soap solution. Rinse the stained area to remove the soap and repeat until the stain is gone. If the stain remains, blot it with acetone.