Steps

• 1). Scrape the old paint off the surface of the cement. Use your paint scraper and a wire brush. All loose particles should be vacuumed or swept away.
  
  
• 2). Scrub the porch with a mixture of ¼ cup of TSP and 1 gallon of water. This will help remove any oil or grease stains. Allow the porch to thoroughly dry. This may take more than one day depending on humidity levels.
  
  
• 3). Fix any damaged areas before painting with a concrete patch so that you have a smooth surface that is free of holes and cracks.
  
  
• 4). Apply a cement sealer and a primer with the paintbrush. Homeimprovement.superpages.com recommends checking with the manufacturer or a professional to be sure the primer and sealer you are using are compatible.
  
  
• 5). Paint your floor with cement or concrete paint using either a paint roller or paint compressor. A paint brush can be used to get into the edges and corners. Allow some drying time between coats if you are applying more than one coat.
  
  
• 6). Apply a cement paint sealer, after the floor is completely dry to touch, to give your paint longer life and to protect it from penetrating oils and colors from food and drink spills.