Painting Metal Siding & Gutters | Professional Tips & Tricks
Posted on January 8, 2020
Exterior metal surfaces require different techniques and prep work for painting than other common exteriors like stucco or wood. In residential, it’s fairly uncommon to have exterior metal walls (but we have seen it) however, metal gutters, rails, support structures, or accents are common. These surfaces need maintenance and painting just as much as your wood or stucco.
Other than aesthetics or color changes, painting metal does provide a functional purpose, it helps prevent rust from forming. A properly painted metal surface will prevent water from reaching the actual metal underneath. If you have a 2 story home, safety becomes a real concern and you should hire a professional painting crew for the project.
Steel Exterior Surfaces
It’s important to keep water and air off of your steel. Here is how to create a protective barrier with paint on steel.
To paint or repaint steel, run a wire brush over any areas where rust may be or has developed.
Get a specialty primer from your local paint store. It will state on the can that it is rust-inhibitive. Applying two coats, with drying time in between, will create an extra-strong protective layer.
Apply your paint. It’s suggested to use 100% acrylic latex or oil-based paint.
Spraying: spray painting is a good option for steel. Follow all directions from the can. If it’s possible, remove the project and place it on a workbench where you have access to the sides for an even finish. Short, fluid strokes will provide a solid finish.
DTM Paints
Some paints are sold as direct-to-metal or DTM paint. They are specially formulated for application on metal without a primer.
Aluminum and Aluminum Siding
Aluminum siding can chalk or wear down if you live in a harsh climate. Refresh your home without a full residing by painting exterior metal.
Make sure the metal is clean and dry. Remove any dirt, grease, or stains.
Cover any nearby areas to avoid getting paint on them.
Prime the metal with anti-rust primer. This will create a good surface for adhesion and prevent future rust breakouts. Allow full dry time.
Use a rust preventative enamel on top. Apply several thin coats and allow to dry completely.
Aluminum and aluminum siding can be painted with good results, but there are a few issues that can happen.
Chalking can happen when the coating is very weathered. If you run your fingers over a piece of your siding and it comes off as a white powder, you have chalking. Use a cleanser like trisodium phosphate before you start your project.
Finish suggestions for aluminum siding are to use a flat or satin finish paint. Since the aluminum is prone to dents, this paint will hide small imperfections. A glossy finish will accentuate dings.
Spraying: Since siding is not able to be removed for painting, be conscious of nearby items. Put down a tarp or drop cloth to protect nearby bushes, ground, or plants. Take into account the wind and any overspray that may overreach your drop cloth.
If you have a painting or home repair project in mind why not schedule a free estimate with CertaPro of Northridge today! We’ll be more than happy to discuss it with you. You can also simply give us a call at 818-714-7004 for any painting or home repair questions you may have.
