Cleaning

• 1). Spray an all-purpose bathtub cleaner on the surface of your tub. Let the cleanser soak into the dirt and grime for 10 minutes. Wipe down your tub with a sponge or cloth.
  
  
• 2). Remove particularly tough stains with a sponge saturated in chlorine or hydrogen peroxide bleach.
  
  
• 3). Scrub in the corners where the tub meets the walls, using a small brush.
  
  
• 4). Remove any rings around the tub with a scrub brush and cleanser.
  
  
• 5). Rinse your tub with water. Allow it to dry.
  
  

Refnishing

• 1). Scrape off any chipped or flaking paint on the bathtub's surface with steel wool. Smooth over the areas where you removed paint, using fine-grit sandpaper.
  
  
• 2). Apply epoxy to the areas you sanded, following the product label directions.
  
  
• 3). Apply a polyester filler to any areas where paint is missing, following the label instructions. Allow the filler to dry. Sand over the filler until the surface is smooth to the touch.
  
  
• 4). Remove any dirt or debris from your tub with a brush and vacuum. Scrub the surface of the bathtub with warm water and a sponge.
  
  
• 5). Rinse out your bathtub with water. Allow time for the tub to dry.
  
  
• 6). Spray or brush on a coat of porcelain paint primer, depending on the product you purchased. Follow the label directions for application and drying time.
  
  
• 7). Spray a thin coat of porcelain paint onto the tub surface, using long, even passes. Allow the paint to dry for an hour. Apply another coat of paint.
  
  
• 8). Seal your tub with a porcelain sealer, following the label directions.
  
  
• 9). Allow the tub to remain untouched for at least 48 hours.