How to Paint a Fiberglass Door

If you’re looking to upgrade the look of your home’s exterior, painting a fiberglass door is an easy and affordable way to do so. But before you pick up a brush, you’ll want to make sure you know how to properly paint it for optimal adhesion and protection. It is important to understand the steps and materials needed to effectively paint your fiberglass door.

How to Paint a Fiberglass Door

In this blog post, we’ll explain in detail why it’s best to opt for a professional painter and walk through the steps on how to paint a fiberglass door necessary if you choose DIY-ing your new door yourself. Read on as we provide all the information, tips, tricks, and step-by-step instructions needed to help give your home an upgrade!

Is Painting on Fiberglass Door Difficult?

Painting a fiberglass door is not an overly difficult task, but it does require careful attention to detail. Prep work and the right selection of materials are key in ensuring effective adhesion of the new paint job. Preparation includes cleaning the door with soap and water or a power washer, sanding the surface to create texture for better paint adhesion, and using a putty knife to remove any existing chips.

The biggest challenge associated with painting a fiberglass door is applying the proper coat of primer. This will ensure your door can be properly sealed and provide years of protection from weathering elements like rain and sun damage. It’s important to select an oil-based primer specifically designed for fiberglass doors, as this type of primer will help the paint last longer and maintain a better seal.

Can Be Properly Sealed

Things to Consider Before Starting

Before you start painting your fiberglass door, there are a few things to consider:

1. Time

You need to consider how much time you have. If you only have a day or two to complete the process, it is best to hire a professional painter who will be able to finish the job in less time and with better results. You should also plan to have the door professionally cleaned before painting.

2. Money

How much money you’re willing to spend? Painting your own fiberglass door will require materials and tools that can add up quickly, so you’ll want to consider the price of buying all the necessary items for an effective paint job.

3. Weather

How often will the door be outside in the weather? If your door is exposed to a lot of sun and rain, a professional paint job will be more durable and last longer than if you do it yourself.

Now that you know what factors to consider before starting, we’ll walk through the steps on how to paint a fiberglass door.

Choosing the Best Paint for Fiberglass Door

The first step in the painting process is to select the right paint for your door. Acrylic latex paints are best suited to fiberglass doors as they provide good adhesion and flexibility, which will help prevent cracking in extreme temperatures. You can also choose a combination of acrylic latex and enamel paint for better adhesion and protection.

10 Steps on How to Paint a Fiberglass Door

Step 1: Remove the Dirt

Remove any existing chips and dirt with a putty knife. Dirt and debris can cause the paint to not adhere properly. Removing it will help ensure a better bond. It will also help keep your paint job looking neat.

Step 2: Clean the Surface

Clean the Surface of Your Door

Clean the surface of your door with soapy water or a power washer to remove any dirt, dust, oil, or debris. This will help ensure you get a clean paint job. Allow the door to dry completely before proceeding.

Step 3: Sand the Surface

Sanding the surface of your door will help create a greater texture for better paint adhesion. Always use medium-grit sandpaper or orbital sander to prevent scratches on the surface. Sanding will also help to smooth out any existing chips or rough edges.

Step 4: Prime the Door

Once you have sanded the door, it’s time to apply a coat of primer. Select an oil-based primer specifically designed for fiberglass doors and use a brush or paint roller to apply it evenly over the entire surface. Allow the primer to dry completely before proceeding.

Step 5: Paint the Door

To Apply a Coat of Paint

Once your primer is dry, it’s time to apply a coat of paint. Make sure you use high-quality paint specifically designed for fiberglass doors, and follow the manufacturer’s instructions on how many coats are necessary. When applying the paint, follow the same steps as with the primer, using a brush or paint roller to apply it evenly over the entire surface.

Step 6: Allow Paint to Dry

Once your coat of paint is applied, allow it to dry completely before applying any additional coats. You may need several coats depending on how much weathering your door has experienced.

Step 7: Add Protective Coating

Once your paint job is complete, you may want to add a protective coating. This will help prevent fading and wear due to weathering. Usually, this can be done with a paint sprayer or roller. Protective coatings are available in both water-based and oil-based varieties.

Step 8: Clean Up

Clean Up Any Excess Paint

Once you have finished painting your door, be sure to clean up any excess paint or primer from the surrounding area. This will help keep your work area clean and free of messes.

Step 9: Inspect for Quality

Inspect your finished paint job to make sure it looks good and is free of any imperfections. If you notice any chips or defects, you may need to apply additional coats of paint or primer before proceeding.

Step 10: Enjoy Your New Look!

You should now have a beautiful fiberglass door that looks like new! Congratulations on a job well done! Enjoy the new look of your door.

Following these steps on how to paint a fiberglass door will help you achieve a beautiful and long-lasting finish. If you’re still unsure about how to go about painting your door, it’s always best to hire a professional painter who can do the job for you. With their expertise, you can be sure that your door will look its best for years to come.

8 Additional Tips to Make the Door Look Great

  1. Use a roller brush to paint large areas of the door quickly and evenly. A roller brush is especially ideal for painting doors with panel designs, as it will easily reach into the grooves and crevices of such doors.
  2. Apply painter’s tape around edges, window frames, and other parts you don’t want to paint to avoid any unwanted or smudged lines. The tape will also help ensure a cleaner, neater finish.
  3. Before painting the door, make sure that you sand away any rough spots or imperfections to get an even finish and smooth paint job once complete.
  4. Use a primer as a base coat before starting on the actual paint job to ensure better adhesion and coverage of your chosen color.
  5. Use high-quality paint designed specifically for exterior use or fiberglass doors, as this type of paint is resistant to ultraviolet light and abrasions, making it less likely to crack or chip over time. Quality paint will also last longer and look more vibrant.
  6. Start painting from the top of the door down, as this will ensure that any drip marks are covered up by subsequent brush strokes. This will create a nicer, more even finish.
  7. To protect your newly painted fiberglass door from potential damage, consider adding a clear sealer or a protective coat of polyurethane after the paint job is finished.
  8. Enjoy your newly painted fiberglass door! To keep it looking great and extend its lifetime, make sure to clean and inspect it regularly for any signs of wear and tear. Touch up as necessary with more paint or sealant.
Use a Roller Brush

Following these additional tips will help make your fiberglass door painting project more successful. With the right preparation and materials, you can be sure of getting a beautiful, professional-looking paint job that will last for years to come.

How Much Will It Cost?

The cost of painting a fiberglass door will depend on several factors, including the size and condition of the door, as well as any replacement hardware or materials that may be required. Generally speaking, professional paint jobs can range from $100 to $500, with DIY projects coming in at around half of this. It may also be necessary to factor in additional costs, such as primer and sealant, so make sure to do your research beforehand.


With a little bit of patience, anyone can transform an old, weathered fiberglass door into a beautiful, modernized centerpiece for their home. Although the process requires attention to detail and can take a couple of weekends’ worth of effort, it’s worth the joy that comes from knowing you completed the project with your own two hands.

Painting new doors can be expensive, but with this DIY method, you get to save money whilst creating something unique and custom-made for your home.

With the right tools and materials being used, painting a fiberglass door is easy as long as you follow these guidelines on how to paint a fiberglass door. Remember to always apply primer before painting, use multiple light coats of paint rather than one heavy coat and be sure to sand in between coats so the result will be an even and smooth layer of paint on its exterior surface.

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Angela Ervin

Angela is the chief editor of Indoorense. She began her career as an interior designer before applying her strategic and creative passion to lifestyle and home. She has close to 15 years of experience in creative writing and online content strategy for housekeeping and cleaning,home decorations as well as other efforts. She loves her job and has the privilege of working with an extraordinary team. She lives with her husband, two sons, and daughter in Petersburg. When she's not busy working she spent time with her family.

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