How to repaint your aluminium door

repainting aluminium entrance doorSo, it’s time for a change. Out with the old and in with the new. A different paint colour, or upgrade for your aluminium door. And rather than hiring a specialist, you’ve decided to give it a go yourself! 

The good news is that painting aluminium doors can be pretty straightforward if you plan, prepare, and plan again! 

In this post, we take a look at some points to remember and tips to take into consideration when embarking on your repainting journey. 

How to paint an aluminium door 

It’s all in the preparation 

Firstly, the door and frame you’re looking to repaint must be cleaned thoroughly, and we’re not just talking a quick wipe down – it must be scrubbed! The reason for this is not because we’re particular on cleaning, but rather it helps the paint adhere to the aluminium much easier, providing a smoother finish. 

You can use warm soapy water to clean doors and frames, alongside a heavy-duty sponge or even a brush to wipe away any dirt and debris. 

However, degreasing cleaner can also help to clean doors as well as any ammonia-based cleaning products. 

Scratch off any rust or stains that are visible and wipe down to clear away any residue. 

Once you have cleaned the door, wipe the door down with clean water, drying the door thoroughly before moving onto the next steps. 

It’s also important at this stage to remove any door handles/knobs, as well as door knockers or numbers, etc. Ultimately, any door accessories that shouldn’t be painted. 

Ideally, we would recommend you lay the door flat on a horizontal work surface to prep and paint. 

However, if this isn’t possible, make sure to place an old cloth or rag underneath the door and surrounding area to stop floors and walls, etc. from being a painted target! 

Priming goes a long way 

An aluminium surface that hasn’t already been painted needs to be primed. 

This is to guarantee that the paint sticks and stays on the aluminium for a considerable length of time. 

Spray primers are the most commonly used; however, you can also apply primer with a paintbrush or roller. Ultimately, it’s whatever you feel comfortable with. 

A top tip when priming is to look to achieve an even and consistent coverage, avoiding gaps and drips wherever possible. 

If the door and frame have already been painted, then a primer will only be required if you are changing the colour of the door completely, or if the current paint has deteriorated badly. 

The primer should be completely dry before moving on (we’d recommend leaving primer to dry for at least 6 hours). 

Note: If your door or frame feels uneven or bumpy in places, quicksand can help to smooth things out. A sanding block or sandpaper will help to remove any imperfections. 

The Painting Process 

Please make sure that the paint you are using is suitable for aluminium surfaces! 

We find acrylic paint performs exceptionally well on primed aluminium surfaces. 

Metal spray paint is also a popular option (however, please be careful where you’re spraying if the door is still attached to the hinges and within the home). 

Once you have chosen your paint type, apply your first coat slowly and steadily, moving up and down the door.  

If using a metal spray paint, make sure to spray the entire door in the same direction to ensure consistent coverage. (Also, important to note when spraying, is that lighter coats offer a neater finish than thicker coats). 

We’d also advise painting any hard to reach areas first and on the initial coat. 

Your door may need several coats of paint to reach your desired colour. 

Make sure always to be aware of any drips or runs, and always let the first coat of paint dry before applying another – typically paint needs at least one day to dry. 

Leave a small amount of overlap between the paint and any glass panels, helping to ensure a watertight seal. 

Note: If you find any paint on the glass panels within the door, this can be carefully scraped off using a sharp razor blade. 

Find out more here!

After painting… 

…reattach all door handles, door knockers, numbers, etc. and remove any protective masking tape. 

Your door should now look exactly how you want it to. 

Tools to keep handy 

Depending on the type and style of aluminium door, you will need a selection of tools:

  • 4-inch roller 
  • Average sized roller 
  • Latex Paintbrush 
  • Masking tape 
  • Protective eyewear 
  • Gloves 
  • Rags/cloths 
  • Newspapers (to protect windows) 
  • Cleaner 
  • Paint! 

It’s also essential to:

  • Be aware of toxic fumes, by ensuring that you paint and spray paint in well-ventilated areas 
  • Cover all floors and surrounding areas to avoid being caught with specks of paint 
  • Always wear the most appropriate clothing, as well as goggles and gloves where necessary 

Aluminium doors and windows look sleek and can last much longer than their wooden counterparts.  They also come in a variety of styles and types too. 

At Crucial Engineering, we’re the aluminium fabrication specialists. Specialising in all types and styles of aluminium doors and windows as well as supporting with all aluminium door repairs. 

To find out more, check our pages online, or call a member of our friendly team on 03451 930 420. 

Read the next article: Buyers Detailed Guide to Internal Doors



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