A canopy in the yard will create additional storage space or expand your home's workspace. Metal awnings are sturdy and available in various sizes. If you have a metal canopy, you may find that it requires frequent cleaning to prevent corrosion. In order to prevent damage to the canopy in the future, it is important to properly prepare its surface, apply a primer and repaint the canopy when rust starts to appear on it. Take sufficient time to remove rust and prepare the canopy surface. Also, when choosing a primer and paint, spend more on better materials. This will save you money because the paint will last longer. Learn how to paint a rusty metal canopy.
Method 1 of 2: Preparing a metal canopy
Step 1. Spray water onto the canopy using a hose
Use a powerful spray nozzle to remove leaves, dirt, and other debris. It is important to clean the canopy well to see which areas are the most rusty.
Step 2. Wash the surface with a mixture of water and a strong detergent
Dirt will trap moisture and accelerate rusting, so take some time to clean your canopy. Use a sponge with a soft and abrasive side and then rinse the surface well.
Step 3. Apply paint thinner to the rag to get rid of newly formed rust
This type of rust appears quickly on wet metal surfaces. It can damage metal if not removed immediately.
Step 4. Sand around any holes with 80-120 grit sandpaper
Clean the surface and apply paint thinner with a rag to remove any recent rust spots.
Step 5. Fill the holes with automotive body putty
Use a putty knife to apply the putty and smooth it out until it is almost flush with the metal surface of the metal. Let the body putty dry completely.
Step 6. Remove rust from the canopy
There are a number of techniques you can use to do this. Select a method based on the materials available and the amount of rust.
- Buy a wire brush attachment for a drill if there is rust on only some parts of the canopy, and not on its entire surface.
- Use a belt sander and hand sander to remove rust on large areas and corners. Use fine sandpaper to keep the rusty areas intact. Basically, when repainting metal sheds, it must be sanded. While you can sand by hand, using an electric tool will save you time.
- Rent a hand-held sandblaster for large areas. This device uses compressed air to blow fine sand to the surface. This has the same effect as sanding but is very effective. Be sure to cover plants and objects with dust covers. The sandblaster is extremely effective for metal carving and smaller, hard-to-reach surfaces as well as long, flat surfaces.
- Use a combination of any of the above methods, whichever is most effective. Remember that the areas where the body putty has been applied must also be sanded down so that the paint adheres well to the surface.
Step 7. Wash the canopy surface again with detergent and water
This will remove any sand and dirt particles that have accumulated. Let the surface dry completely before painting.
- If the size of the canopy allows it, dry it with a rag to reduce the chance of rust build-up.
Method 2 of 2: Painting a metal canopy
Step 1. Apply anti-corrosion primer with a brush
Make sure you fill any gaps in the canopy surface.
- Read the instructions for using the anti-corrosion primer. This primer generally requires a more gentle application than most paints. Distribute the primer according to the rates indicated on the container.
Step 2. Watch for rusty moisture on the surface of the primer when it dries
Wipe the surface dry with a dry cloth. Allow the primer to dry completely when the moisture has been removed.
Step 3. Apply a second coat of anti-corrosion primer
If your main goal is to avoid rusting, apply a second coat of primer and watch out for rusty moisture as it dries.
Step 4. Apply the first coat of water-based acrylic enamel
Choose a high quality paint that has anti-corrosion properties. When applying paint, you can use brushes or spray.
Step 5. Apply a second coat of paint after the first is dry, especially if you chose a light paint
Many metal primers are red or other dark colors and can show through.
Step 6. Let the canopy dry
Remove the covers.
- Always wear a long-sleeved shirt and long pants as work clothing when working with this type of material.
- When working with decorative iron or very rusty surfaces, consider using an organic rust converter instead of sanding to remove it from the surface. This product converts rust into an inert substance. However, it can create an uneven surface and should not be used if you want a quality finish on your metal canopy.
- Be sure to finish painting within a few days. Accumulation of dirt will cause rust to develop under the paint layer, causing it to deteriorate more quickly. Wipe the surface with a special anti-dust cloth if you suspect dirt has accumulated after washing, priming or painting.