Scrape off any excess paint by gently chipping it away using a razor blade. Hold the blade at a 45-degree angle and scrape only the paint and not the vinyl surface.
Mix 1 cup of warm water and 1 cup of white vinegar. Add several squirts of liquid dish soap as well.
Wet a soft cloth with the solution and use it to saturate the puff paint stain.
Wipe the paint residue away with a clean, dry cloth. Rewet the stain with the moist cloth if necessary and wipe away any remaining stain.