
Plastic chairs are a durable, lightweight, and economical seating option. However, they can become faded, dirty, and damaged over time, especially when exposed to the elements outdoors. Fortunately, there are several methods to renew old plastic chairs, ranging from simple cleaning techniques to more involved processes such as painting and the use of specialised products. With some creativity, motivation, and elbow grease, you can restore your old plastic chairs to their former glory, giving them a new lease of life.
| Characteristics | Values |
|---|---|
| Regular Maintenance | Regular dusting and wiping with a wet cloth |
| Deeper Cleaning | Soap, water, and a brush |
| Covering | Cover with a cloth or a fabric cover when not in use |
| Cleaning Products | Bleach, lemon juice, vinegar, baking soda, car wax, WD-40, petroleum jelly, linseed oil, mineral spirits |
| Repainting | Use spray paint suitable for plastic |
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What You'll Learn

Clean with soap, water and a brush
To renew old plastic chairs, cleaning them with soap, water, and a brush is a great first step. This method is especially useful for removing dirt and grime from the surface of the chairs. Here is a detailed guide on how to do this effectively:
Prepare the Cleaning Solution
Mix a few drops of mild dish soap with warm water in a bucket. You can also use a gentle liquid soap or detergent. Ensure the soap is fully dissolved in the water to create a consistent solution. Avoid using abrasive or harsh cleaners, as these can scratch the plastic and make the surface more susceptible to grime buildup.
Apply the Solution to the Chairs
Use a soft cloth or sponge to gently wipe down the chairs with the soapy solution. Pay close attention to areas with noticeable dirt or stains. You can also use a brush to scrub the solution onto the chairs, but be careful not to use a brush that is too hard or stiff, as this can scratch the plastic. Work the solution into the plastic gently but firmly, ensuring that all areas are thoroughly cleaned.
Rinse and Dry the Chairs
Once you've scrubbed the chairs with the soapy solution, thoroughly rinse them with clean water to remove any soap residue. You can use a hose or a bucket of clean water for this step. After rinsing, dry the chairs with a soft cloth or towel. Make sure to dry all surfaces, including the legs and arms of the chairs, to prevent water spots and promote a consistent finish.
Additional Tips
- For tough stains, create a paste with baking soda and water, apply it directly to the stain, let it sit for a few minutes, then scrub gently before rinsing.
- To remove mould or mildew, use a solution of equal parts vinegar and water. Apply it to the affected areas, let it sit for 10-15 minutes, then scrub gently and rinse.
- After cleaning, consider applying a thin coat of automotive paste wax or car wax to the chairs. This will provide a protective coating that repels water and dirt, reducing the need for frequent cleaning.
By following these steps, you can effectively clean and renew your old plastic chairs, making them look shiny and presentable once again.
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Use a heat gun to melt and reform the plastic
To renew old plastic chairs with a heat gun, follow these steps:
- Clean the plastic chair thoroughly to remove any dirt, dust, or grime. This step is crucial, as failing to do so may cause the dirt to fuse into the plastic when heated.
- Take your heat gun and hold it close to the surface of the chair.
- Move the heat gun in a slow, sweeping motion or a tight circular pattern. Keep it in constant motion to avoid melting more than the surface of the plastic.
- Work in a well-ventilated outdoor area to prevent any safety hazards, such as fires. Be cautious to avoid burning yourself during the process.
- You will notice that the colour of the plastic returns, although it may have a slightly undulating sheen.
While this method is effective, it is important to note that there are other methods available that may produce better results, such as using a blend of boiled linseed oil and low-odour mineral spirits.
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Apply a linseed oil and mineral spirits blend
To renew old plastic chairs, one effective method is to apply a blend of linseed oil and mineral spirits. This method is particularly useful for plastic rejuvenation, bringing back the colour and shine of the plastic.
The blend consists of boiled linseed oil and low-odour mineral spirits, also known as paint thinner. The ratio of the blend is typically 60% boiled linseed oil to 40% mineral spirits. The boiled linseed oil offers a bit of colour and will continue to add colour over time as the plastic chair is exposed to oxygen and sunlight. The mineral spirits, on the other hand, act as a thinning agent, making the blend easy to spread evenly over the chair's surface.
To apply the blend, use a clean cotton rag to wipe it onto the plastic surface. Ensure that you wipe it thoroughly until the coat is as thin as possible, with no visible puddling or pooling of liquid. You want to wipe it almost dry. Then, let the finish dry, which typically takes a couple of hours.
After the first coat has dried, use an extra-fine sanding sponge (usually #330 grit or similar) to gently sand the surface and remove any finishing imperfections. This step prepares the surface for the next coat. Apply a second coat of the linseed oil and mineral spirits blend, repeating the wiping and drying process.
You can apply additional coats as needed, building up the finish to achieve the desired look and protection for your plastic chair. This method not only restores the appearance of old plastic chairs but also provides a reasonable amount of protection without leaving a thick plastic coating.
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Treat mildew with bleach, lemon juice or vinegar
If your old plastic chairs have mildew on them, there are several ways to treat it using bleach, lemon juice, or vinegar. Here are some detailed instructions for each method:
Bleach
Create a solution of bleach and water, using approximately four parts water to one part bleach. Soak a cloth or brush in this solution and scrub the mildew off your plastic chair. You can also soak the chair itself in the solution if it is small enough, or dip it briefly if the mildew is particularly stubborn. Be sure to wear protective gloves and work in a well-ventilated area when using bleach. After treating the mildew, rinse the chair with clean water and allow it to dry completely.
Lemon Juice
Lemon juice is a natural alternative to bleach. Mix equal parts lemon juice and water, and apply the solution to the mildew with a cloth or brush. Let it sit for a few minutes, then scrub or wipe away the mildew. Rinse the chair with clean water and buff it dry with a soft cloth. Lemon juice can also help remove any unpleasant odours from the plastic.
Vinegar
Create a solution of vinegar and water, using one part vinegar to three or four parts water. Bring this solution to a boil on the stove, then remove it from the heat and place the items in the solution for one to two minutes. Allow the solution to cool, then rinse the items with clean water and let them air dry. For larger items that cannot be boiled, you can soak a cloth in the vinegar solution and scrub the mildew, or use a spray bottle to apply the solution and wipe it down with a cloth.
When treating mildew with any of these methods, it is important to work in a well-ventilated area and wear protective gear such as gloves and eye protection. Always test a small, inconspicuous area of the plastic chair first to ensure that the chosen treatment method does not discolour or damage the surface.
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Repaint with spray paint
If your plastic chairs are looking tired and worn, a simple way to give them a new lease of life is to repaint them with spray paint. This is a quick and easy DIY project that can be completed over a weekend and will cost very little.
First, you need to prepare your chairs for painting. If they have been outside, they may be dirty, so wash them thoroughly with hot water, an all-purpose cleaner, and a sponge. For stubborn stains or mould, use a cleaner with ammonia and spray it down with a garden hose. If your chairs are just dusty, a simple wipe down with a wet cloth will be sufficient. Once clean, dry the chairs with a towel and let them air dry completely.
Some chairs may require light sanding before painting, especially if they have been painted before. Use a fine-grit sandpaper or a sanding sponge to lightly scuff the surface so that the new paint will adhere well. This will also remove any white powder on the surface of faded plastic chairs. Wash the chairs again to remove any dust from sanding and let them dry completely.
Now, it's time to prepare your workspace. Choose a well-ventilated area, preferably outside, and cover the floor with drop cloths or newspapers. Cover any non-plastic surfaces, such as metal legs, with painter's tape. Remember to wear safety glasses and a dust mask to protect yourself from paint mist.
Select a spray paint that is suitable for plastic. You can use a paint and primer in one, or apply a primer first if you want to use a particular colour that is not available in paints made for plastic. Shake the can thoroughly, then spray the entire chair, holding the can about 12 to 18 inches from the surface and applying in a sweeping motion. Let the primer dry for the recommended amount of time, then apply a thin coat of paint. You can flip the chairs upside down first to do a few light coats on the bottom, then do the same on the tops once the bottom is dry.
Follow the manufacturer's directions for drying time and recoating, and apply several light, even coats until you achieve the desired finish. This is a simple and inexpensive way to refresh your old plastic chairs and give them a brand-new look.
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