It is common for aluminium window frames to be anodized.
When the surface is anodized, it means the material has been coated with a protective oxide finish to keep it strong and durable for a long time.
Sometimes aluminum frames are powder-coated, but many contractors have found that anodizing the frames is a much better option, especially when people at home need to open and close their windows all the time.
The anodized protective oxide layer in this case allows the frames to resist the constant physical abuse they incur daily.
Can You Paint Anodised Aluminium?
Yes, it is possible to paint your anodized aluminium frames.
Particularly, if you don’t like the current colour of your anodized window frames, then you’ll obviously need to paint them a different colour.
But remember, it is not as easy as slapping a new coat of paint over the protective oxide layer of the frames.
You will need to prepare the anodized aluminium frames properly before you start painting them.
If you don’t prepare the frames correctly, then it will be challenging to get the paint to stick to them.
Why Painting Anodized Aluminium Is Not the Best Option?
Although it is possible to paint over the anodised aluminium window and door frames, it is not the best option most of the times.
This is generally due to the fact that anodised aluminium does not have any pores, which is why paint has such a tough time sticking to it.
Experts only recommend painting anodized aluminium frames if you notice corrosion forming on the surface of them.
Corrosion may develop due to pitting or dents in the frames. You must paint over these areas to stop the corrosion from occurring again.
Alternatively, you don’t even need to paint over the surface to protect it from corrosion.
After you remove the existing corrosion, you can simply add an invisible protective coating to the aluminium surface, such as a metal resurfacing solution.
Then you won’t even need to mess with the paint option.
But if you don’t like the color of the frames, then paint is still the only option.
Just be prepared to perform maintenance on the painted surface of your anodized aluminium window frames every few years.
That is about the time when the paint starts to deteriorate and chip away. You’ll have to remove the old loose paint first before you can repaint over it.
How to Paint Anodized Aluminium Window Frames Safely?
If you’ve decided that you still want to paint your anodized aluminium window frames, despite the objections of experts, then you need to do it safely.
Below are the four main steps for painting your anodized aluminium window frames safely.
Step 1) Clean the Anodized Aluminium Surface
You should never begin any paint job without cleaning the surface of the material first.
Anodized aluminium frames can be cleaned with a simple scrubbing brush, warm water and dish soap.
Once you have these materials, mix the warm water and dish soap together in a bucket.
Dip the bristles of the brush into the mixture solution and begin scrubbing the surface of the frames with the brush.
When the surface looks clean, rinse off all the soapy water. Now give the surface some time to dry completely.
Step 2) Apply the Primer
Etching primer is a special type of primer that makes it easier for paint to stick to metal surfaces.
Pour about 1 gallon of etching primer into a pot or bucket. Don’t fill the container up more than two-thirds of the way.
Using a paintbrush that is between 2 inches and 4 inches long, apply the primer to the surface of the frames.
After you apply the primer, give it two hours to dry before moving onto the next step.
Step 3) Clean the Brush
Mineral spirits can be used to clean the paintbrush. All the primer needs to be removed from the bristles before you use the brush for painting.
Of course, you can use another brush for that too. But you still need to clean the primer brush either way.
Step 4) Paint the Aluminum Surface
Oil-based paint should be used for the frames. Pour the paint into a container about two-thirds of the way.
Dip the bristles of the paintbrush into the paint and begin painting over the surface of the anodized aluminum frames.
When you’re done applying the coat of paint, wait two hours for it to dry.
You may need to apply more coats of paint afterwards. If so, then wait two hours in between coat applications.
Jack Luis is a semi-retired painter who loved painting his clients’ ideas on their walls. He had worked as a painter for more than a decade to serve the customers in areas such as Charleston, Mount Pleasant, Beaufort, Georgetown, SC (South Carolina). Today in his free time, he likes to read and write about the newer techniques that are being implemented in his profession. You may read more about him here or get in touch with him here.