How To Fix Peeling Steel Garage Door Paint

If you have a steel garage door, you may find the paint has peeled. Steel surfaces don't accept paint well since they are non-porous. Peeling paint commonly occurs because of humid conditions, improper surface preparation, and poor paint quality. 

Luckily, you don't always have to replace the door or even repaint the whole door. It is possible to fix small sections of peeling paint by following these steps.

Prepare to Fix the Peeling Paint

To fix the paint, gather the following:

  • plastic gloves
  • sponge
  • garden hose or pressure washer
  • mild liquid dish soap or trisodium phosphate
  • masking tape
  • 120-grit sand paper
  • metal putty knife and paint scraper 
  • paint tray
  • paint roller with a soft nap
  • rust-inhibiting primer
  • acrylic latex garage door paint

Buy paint in a color that matches the original as close as possible, and check the label for the temperature range for using the paint. Avoid applying oil-based paint, since it may void your warranty. Keep the receipt for the paint, since most hardware stores will let your return paint you already mixed, if it doesn't stick, or it is the wrong color. 

Clean and Sand the Door

Use the putty knife to scrape peeling and chipped paint, and sand the damaged areas until you feel a texture. You may need to sand the area several times. For stubborn pain that won't come off, remove it with a paint scraper. 

If the layer underneath the peeling looks powdery or greasy, it indicates the paint must be stripped from the entire door. It is ideal to contact a professional door repair service in this case. If the door is still under warranty, you may be able to get a replacement, since the door manufacturer is at fault for the coating.

Mix several drops of dish soap with two gallons of warm water in a  bucket, dip the sponge in the solution, and scrub the door  Mix a third-cup of trisodium phosphate in the water in place of dish soap for extra dirty or stained doors. Spray the door with the garden hose or pressure washer, then let it dry. 

Prime and Paint the Door

Roll on the primer, then give it at least two hours to dry. Rollers won't leave scratches like brushes. Dried primer should feel slightly sticky to the touch.

Test the paint by brushing it on a small section. Let the paint dry for about two hours, lay a piece of masking tape over the area, then remove it. If the paint comes off, try the paint again at the suggested temperature. Add paint to the paint tray, roll on the paint, and let it dry.

For more information, contact a business such as Affina Door.