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Painting corrugated metal is a simple process that can be done with a few basic tools and materials. First, clean the surface of the metal to remove any dirt or rust. Next, apply a coat of primer to help the paint adhere to the metal. Once the primer is dry, choose a high-quality paint that is suitable for metal surfaces. Apply the paint evenly using a brush or roller, making sure to cover all the crevices and ridges. Allow the paint to dry completely before applying a second coat if necessary. With these steps, you can easily paint corrugated metal and give it a fresh new look.
Painting corrugated metal is a relatively simple process that can help prolong its lifespan. However, the type of metal, whether it’s galvanized steel or aluminum, will determine the necessary preparation. Galvanized steel, which has a zinc coating to protect against corrosion, may reject paint if not treated with vinegar beforehand. On the other hand, aluminum should be degreased to improve paint adhesion. For corrugated aluminum, it is recommended to wait six months after installation before painting to ensure the surface is fully weatherized. Here are the steps to paint corrugated metal.
1. Clean the Metal
Prior to painting, it is important to remove any dirt, dust, or loose paint. Failure to do so may result in the paint not adhering properly and causing premature flaking or peeling. Cleaning corrugated metal is a quick and easy process. Simply use a pressure washer on a high PSI setting to spray the entire surface.
2. Prep the Metal
For galvanized steel, apply white vinegar to remove the zinc layer and improve paint adhesion. Pour vinegar onto a rag and wipe down the surface of the steel. Rinse thoroughly and allow it to dry for at least an hour.
For aluminum, use a commercial degreaser to clean the surface. Create a cleaning solution by adding degreaser to a 5-gallon bucket and wipe down the aluminum with a clean rag. Rinse the metal well with water and allow it to air dry for at least an hour.
3. Apply a Primer
Due to the various angles and crevices on corrugated metal, an airless sprayer is the most effective tool for applying paint and primer evenly. Use a sprayer to apply a water-based primer specifically designed for metal surfaces.
While some oil-based primers can be used on metal, water-based formulas are recommended as they can be diluted with water instead of turpentine or paint thinner. Water-based products are easier to work with and can be applied with a sprayer after dilution.
4. Paint the Surface
Clean the sprayer and fill it with latex paint suitable for metal surfaces. Dilute the paint as needed for an even spray. Apply the paint evenly across the entire surface and allow it to dry.
