How to Prep and Paint a Garage Door

Prepping and painting a garage door is not a difficult task, and if done properly, can hold up to the harshest conditions for many years. In this article, I will explain the steps required to complete the job with great results.

The first step is to determine what the door is made of, wood, steel or aluminum would be the most probable materials. The initial prep would vary for these substrates but the finish steps would be the same. Lets start with wood. It is first necessary to determine if there are any rotten areas to be replaced or patched. Use a good patching compound such as the Durhams Rock Hard Water Putty. For a steel door, determine if there is any rust on the door, if so sand or wire brush those areas and treat with a rust converter to inhibit any further rust. Next, scrape off any lose or chipping paint with a good scraper and lightly sand the edges smooth to give you a uniform appearance. If there is any mold or mildew present it is important to treat that with a good mildewcide cleaner before applying any paint.

The next important step would be to give the door a final check before applying a primer. If there is any dust from sanding or dirt make sure it is clean and dry before starting to prime. I would recommend priming the entire door with a good primer such as the Zinsser 1-2-3 Primer. Use a good paint brush such as the Purdy XL-Elasco to apply the primer making sure to coat, not only the front and back, but the edges of the door also. Let the primer dry for about 2 hours before applying the finish coat.

To apply the finish coat, I would recommend the Zinsser PERMA-WHITE® Mold & Mildew-Proof™ Exterior Paint available in satin or semi-gloss finish. You can use the same Purdy brush you used for the primer, or if the door is smooth, you can use a Wooster mini roller, or a combination of both. Usually one coat of primer and one finish coat is sufficient but if you have enough finish coat left, wait about 4 hours or over night and give it that 2nd top coat. That will ensure many years of good protection in the hot summers and cold winters.

At we are the experts and all of the materials mentioned are available in our online store and shipped right to your door! Make sure and check out our blog on Tips for Painting Outside in Cold Temperatures.

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One Response to How to Prep and Paint a Garage Door

  1. Pingback: Custom Garage Doors

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