Most commercial metal doors are usually painted, but in most cases, painting one may prove highly challenging. When done correctly, it can give long-lasting results. Read this guide that explains how to paint a commercial metal door in the most professional way possible.
Planning and Preparation
First, organize the space where the painting will occur before you start. This includes arranging a work space and collecting necessary tools and supplies.
Workspace Setup
Select a well-ventilated region to avoid fumes from paint that may be lethal to your health. Lay a tarp or a sheet on the floor to mitigate paint spillages. Take down anything that could be in the line of fire of the paint, like curtains or switch plates from the walls, to avoid getting paint on them. Lastly, make sure that there is good lighting in the working area to allow you to see well.
Tools and Materials
- Primer
- Paintbrushes- small ones as well as large ones
- Spray gun (optional)
- Sandpaper
- Painter’s tape
- Drop cloth
- Stirring stick
- Rubber gloves
- Degreaser or detergent
- Sodium tripolyphosphate or Trisodium Phosphate (TSP) solution
- Rags
- Safety glasses
Door Inspection
Take the time to check for any damage to your door before painting it. Look for roughness or scruffs; they can also be flaws that include scratch marks, dents, indentations, and so on.
Cleaning and Sanding
Prepare the door for painting by cleaning or sanding it to ensure the paint will stick well to the door.
Follow these steps to clean and sand your metal door:
Cleaning
With water and a degreaser or detergent, clean the door as you prepare a trisodium phosphate (TSP) solution. This will help to wash off any form of dirt, oil or grime, which hinders the surface for the paint to adhere. Apply cleaner on the door’s surface and use a stiff brush to clean the entire sections of the doors. After that, rinse the door with clean water and dry it completely.
Sanding
Using 120-grit sandpaper, lightly rub the entire door to get an abrasive surface on which the paint can stick. On small pieces, clean off the surface dust left by sanding, by vacuuming or dusting.
Applying Primer
Primer should be applied, especially when working on a metal surface. It enhances the adherence of paint, allowing it to stick better on the surface and last longer.
Follow these steps to apply primer to your door:
Choose the Right Primer
Choose a premium-grade, solvent-inhibiting primer formulated for metal substrates. This type of primer will offer you the best adherence on your door and protect it from wear and fading.
Apply the Primer
With a brush, apply the primer on the door as per the manufacturer’s recommendation until you get a good coat on it. You can also use a spray gun for even coating, which is a faster technique than the roller. You should use at least two coats of primer, which should be allowed to dry in between coats.
Painting the Door
Follow these steps for the best results:
After your door is clean, sanded, and primed, it is time to paint the door.
Choose the Right Paint
Choose a reliable paint for exterior use that will be suitable for use on metal surfaces. Not only will you be sure your door will be protected from any weather conditions, but it will also serve you for years.
Painting Techniques
Two primary methods for painting a metal door are brush application and spray application with a gun. If you are using a brush, paint the door in thin and smooth coats, starting at the top and painting down. When using the spray gun, apply the paint in thin coats because the paint dries quickly. Allow the first layer to dry properly before applying next layer.
Multiple Coats
To get the best appearance, paint your door at least two times, leaving time in between to dry. This will help to give an even finish and will provide a long-lasting professional look.
Touch Ups
After painting the last coat, you will have to check whether there are some areas that the paint has not covered. With a small brush, if needed, touch up the edges and corner pieces.
Final Touches and Care
After painting your door, ensure that it does not get damaged or touched.
Follow these steps for the best results:
Remove Painter’s Tape
When you are through with the painting, remove all the painter’s tape used in the project without putting extra stress on the fresh paint.
Clean Up
Always clean the tools and equipment well and store them safely and properly. Dispose of rags, empty paint cans, etc properly.
Maintenance
Maintenance of your painted metal door can involve washing it gently, occasionally. To clean the surface, apply a mild washing detergent and water solution, and don’t scrub the surface with a rough material that may injure the paint.
