A large blue metal building to help readers understand the importance of painting metal exteriors.

A Guide To Painting Metal Exteriors

Painting metal exteriors may seem intimidating but the process is very similar to the system used when painting normal exteriors. It does requires proper preparation, technique and materials to achieve a long-lasting finish that will protect your metal building. In this article, we will go in depth on the five key steps to maximizing durability when painting metal exteriors.

Preparing the Surface

The first step to a successful paint job is to prepare the surface properly. Start by cleaning the metal surface thoroughly to remove any dirt, dust, and debris. Utilize a degreaser to eliminate any oil and grime, and then power wash the surface to remove any remaining dirt. Sand down any rust or peeling paint, and use a rust converter to prevent further rusting. Preparing the surface in this way ensures that the paint will adhere to the metal properly and last for a long time. 

Choosing the Right Paint

Two blue paint buckets on a concrete sidewalk to illustrate the importance of choosing paints that are specifically formulated for metal surfaces

Choosing the right paint for your metal exterior is crucial for durability. Look for a paint that is specifically formulated for metal surfaces and has a high level of corrosion resistance. Epoxy-based paints and urethanes are some of the best options for metal exteriors as they have excellent adhesion and durability properties. PPG offers high quality options for painting metal exteriors.

Applying the Paint

A man standing on a roof, painting next to a window to highlight the importance proper application when painting metal exteriors

Proper application of the paint is just as important as choosing the right paint. Use a brush or roller specifically designed for metal surfaces to ensure proper application. Apply paint in thin, even coats, avoiding over-brushing or over-rolling, as this can create bubbles in the paint and result in an uneven finish. Properly applied paint will ensure that the surface is covered evenly, providing maximum protection and longevity.

Choosing the Right Weather

Raindrops dripping down a wall to show the importance painting in ideal weather conditions

Weather conditions can greatly affect the outcome of a paint job. Choose a day with temperatures between 50-85 degrees and low humidity to ensure proper drying and curing of the paint. Avoid painting in direct sunlight or during periods of high wind, as this can cause the paint to dry too quickly and result in an uneven finish. Ideal weather conditions will allow the paint to dry and cure properly, resulting in a smooth, long-lasting finish.

Maintaining the Paint

A pressure washer cleaning a wall to demonstrate the importance of regularly cleaning the surface to remove any dirt and debris after painting a metal exterior.

Once your metal exterior is painted, it’s important to maintain the paint to ensure a long-lasting finish. Regularly clean the surface to remove any dirt and debris, and reapply paint as needed to touch up any areas that have become worn or damaged. Proper maintenance will ensure that the paint lasts for a long time, protecting the metal surface from damage and keeping the building looking great.

Wrapping Up

In conclusion, painting metal exteriors is a task that requires proper preparation, technique and materials. By preparing the surface, choosing the right paint, applying it properly, choosing the right weather, and maintaining the paint, you can achieve a long-lasting finish that will protect and enhance your metal building. Remember that the key to a successful paint job is proper surface preparation and regular maintenance, so take the time to do it right and enjoy the benefits of a beautiful, durable metal exterior. If painting a metal exterior is too large a task for you, our team of expert painters here at Quality Coats are happy to help!

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