Surface Preparation & Painting of Steel Sided Commercial & Industrial Buildings!

When it comes to painting a corrugated metal steel sided commercial or industrial building, proper surface preparation is key to ensuring a long-lasting finish. This is especially important in the harsh climate of the Chicago area, where extreme temperatures and weather conditions can take a toll on building exteriors. In this blog post, we will discuss the proper way to surface prep and paint a corrugated metal steel sided building using a DTM or direct to metal industrial enamel.

Step 1: Clean the Surface

The first step in surface preparation is to clean the surface thoroughly. This involves removing any dirt, debris, or rust that may be present on the surface. For best results, use a pressure washer to remove any loose dirt or debris. If there is rust on the surface, it must be removed before painting. Use a wire brush or a grinder to remove any rust from the surface.

Step 2: Sand the Surface

After cleaning the surface, the next step is to sand the surface to remove any remaining rust and to create a smooth surface for the paint to adhere to. Use a coarse sandpaper or a wire brush to sand the surface. Be sure to wear a respirator and safety glasses while sanding.

Step 3: Prime the Surface

Once the surface is clean and smooth, it’s time to prime the surface. A direct-to-metal (DTM) primer is recommended for this step if the steel is bare or is in a deteriorated condition. The primer will provide a strong adhesion base for the paint to adhere to and will help to prevent rust from forming on the surface.

Step 4: Paint the Surface

After the primer has dried, (assuming you are not using a primer and finish in one type of product),it’s time to paint the surface. A direct-to-metal (DTM) industrial enamel is recommended for this step. This type of paint is specifically formulated to adhere to metal surfaces and to withstand harsh weather conditions.

When painting the surface, be sure to use a high-quality paintbrush or roller to ensure a smooth and even finish. Apply the paint in thin, even coats, allowing each coat to dry completely before applying the next. On large areas use a sprayer, if able. Some DTM's can even be purchased with dryfall/dryfog properties.

Step 5: Inspect the Surface

After the final coat of paint has dried, inspect the surface to ensure that the finish is smooth and even. If any touch-up work is required, be sure to do so before the paint has fully cured.

In conclusion, surface preparation is key when painting a corrugated metal steel sided commercial or industrial building. Proper surface preparation will ensure a long-lasting finish that can withstand the harsh climate of the Chicago area. By following the steps outlined in this blog post, you can achieve a professional-looking finish that will protect your building for years to come. For more information, or if you just don't want to take on the project yourself, you can schedule an estimate by contacting Paint Platoon USA at 800-499-3321 or visit our website at