Replacing an aluminium siding can cost you a lot. So it’s better to paint the siding as it is an easy process and anyone can do it straightforwardly. Let’s see how:
Painting aluminium follows a different approach so before moving forward, check what type of paint has already been used on the aluminium siding. For steel, latex paint is good. If you do not understand the material which has been used for the siding, ask some professional help. And to know the type of paint also, professional can guide you better. To check if the material is aluminium or steel, tap on it with a magnet and if it doesn’t stick, it is aluminium. Plus, if bumps are there instead of breakage, then also it is aluminium.
Next, you need to clean the area with a washer. Angle the spray in the rain direction to get rid of the siding damage. Plus, don’t forget to rinse off the area if you use any chemicals for washing. Or else it can damage the final paint. After drying, if you see any powdery material coming out, don’t get panic. It is chalking which itself is a cleaner for aluminium. To remove it, use a detergent containing TSP.
Then, you need to sand the siding to remove any chipped paint or metal fillings. Don’t do it too hard as the moulding can get damaged because aluminium is easily bendable. Always try not to go below 80 grit sand paper as it can ruin the aluminium siding.
Get hold of a power washer to clean the siding. Power washer as the name suggests need power to operate. More pressure means more power and more disturbances you are going to create while using it. Don’t forget to use safety gears like gloves, boots, ear protector and goggles.
Choose a primer, specifically an oil based primer. Such primer gives extra layer of protection to the siding from outside elements. Or acrylic primer is also an option but for that you have to use acrylic paint only. So be cautious while choosing any primer or paint. Avoid latex primer as it forms gas bubbles with time thus leading to removal of paint from the siding.
Choose right type of paint. I would say to use acrylic exterior grade paint as it is especially for aluminium metal. Choose satin finish paint than matte one.
Painting method is also important to consider. The best way to paint aluminium siding is using paint sprayer but it is the most expensive method over others i.e. roller or brush. Go for airless sprayer having .017 guntip as it gives smooth results. And if you use roller or brush, then try painting with lambswool roller or synthetic fibre brush.
Try painting the sliding using a ladder. Avoiding the ladder will leave the paint to spread in an uneven manner and splotchy way.
The last step is painting the aluminium siding. For this, you have to check the weather condition first. It is said that painting should not be done in cold weather i.e. not more than 50 F or rainy days. It is because rainy day or moisture ruins the paint. Before painting or priming, try starting on the portion where direct sunlight doesn’t reach. It can cause cracks and bubbling.
Next, start applying primer on the siding. Go for at least 2 coats to get proper coverage. If you see any metal or old paint on the primer coating, don’t worry. Just apply thin coating of primer to let it dry fast. Always start priming from the sides and not in the middle. It will make the drying in an even fashion. Give the primer enough time to dry or else bubbles will form making the siding look ugly. 4 hours are enough for drying the primer.
Start painting the siding now. Do long strokes of paint but evenly. Don’t overdo the painting as it will give un-uniform look and if the paint drips, then definitely you are using too much of the paint. Start from the top and radiate downwards. It is because if paint drips, it will not ruin the already done painting. If the siding is horizontal, move from left to right and if vertical, do it up to down. This way you will get even coats and spots will be covered, if any.
Paint consumes 2 hours in total to get dried. What you can do is touch the siding gently from the area which is not noticeable. If you don’t feel any tackiness or stickiness, then the paint is dry. Now you can do the second coating of paint. Always finish the painting of siding in one go or else it will show visible lines if half part is dried and the remaining is still wet.
Before doing the second coat, check if any bubbles or bumps are there. If you find any, remove them using the sand paper and then apply the second coat. Use the sand paper gently on the first coat or else you will get the paint out from the siding. Don’t go too fast in this process and check that the first coat is completely dried.
Second coat is not essential but it is suggested to give a clean and professional look. Plus, the second coat removes the flaws in the first coat thus adding durability factor to the paint.
Lastly, if you see any lines in the coating, it shows that you paint so slowly. Increase your speed of painting to get smooth coats. Avoid stopping in between as it will give lines on the siding. Always paint in panels and finish the whole panel in one go. Happy painting!!