Scrape off any loose or thick paint with a putty knife or paint scraper
Sweep or vacuum the area to remove debris
Apply a paint remover or concrete-safe stripper to the stain
Let the remover sit for the recommended time
Scrub the area with a stiff-bristle brush
Rinse with water and repeat if needed
Use a pressure washer for stubborn exterior paint
For oil-based paint, use a solvent designed for concrete
For latex paint, use warm soapy water or a mild detergent after scraping
For old or deep stains, use a poultice or concrete etcher if appropriate
Seal the concrete after cleaning if needed