Sofia Martinez
Faded plastic can be an eyesore, but there are several ways to restore it to its original colour. Plastic is vulnerable to nature's forces, including sunlight, air exposure, dirt, and pollution, which can strip it of its shine and colour. To prevent fading, you can apply a UV-resistant sealant to form a protective barrier. When plastic has already faded, you can use a variety of methods to restore its colour, including sandpaper, vinegar, bleach, or a heat gun. For plastic discoloured by bromine, hydrogen peroxide can reverse the process. Alternatively, you can paint the plastic or use dyes as a permanent colouring solution.
Characteristics and Values
| Characteristics | Values |
|---|---|
| Cause of fading | Oxidization, sun exposure, UV rays, dirt, pollution, air exposure |
| Colour restoration methods | Hydrogen peroxide, heat gun, vinegar spray, sandpaper, soapy water, paint, dyes, UV-resistant sealant |
| Colour restoration products | Graphene VRT, 303 Aerospace Protectant, Solution Finish, TriNova Plastic & Trim Restorer, CERAKOTE Ceramic Trim Coat Kit, Ecocoat Trim |
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What You'll Learn
Use soapy water and sandpaper to restore hard plastic
Faded plastic can be caused by several factors, including sun exposure, dirt, and oxidation. While there are various methods to restore discoloured plastic, such as using a heat gun, hair cream with hydrogen peroxide, or bleach solutions, one effective method for hard plastics is to use soapy water and sandpaper.
Firstly, ensure your plastic item is very clean. Wash it with mild soap and water to remove any dirt and debris, as these can cause scratches. Mix a few drops of dishwashing soap in a cup of warm water, and scrub the plastic gently with a soft cloth or sponge. Rinse the item with clean water and dry it with a soft towel.
Next, prepare your sandpaper. For this method, you will need two types of sandpaper: 150-grit and 220-grit. Ensure you use sandpaper meant for wet use, as this will prevent it from falling apart during the process.
Fill a bucket with soap and water, and dip the 150-grit sandpaper into the soapy water. Start with the deeper scratches, and rub the surface of the plastic in a circular motion. Cover each faded area 5-6 times. Then, repeat the process with the 220-grit sandpaper, using the same circular motion. Again, cover each section 5-6 times. Finally, rinse the surface with clean water.
If there are still scratch marks on the plastic, you can continue using a finer grit sandpaper until they are removed. To finish, you can use a buffing wheel or buffing paper to give the plastic a gleaming, shiny finish.
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Apply hydrogen peroxide to reverse discolouration
To reverse discolouration on plastic, you can use hydrogen peroxide. This method works by removing the protective yellowed layer and exposing the lower layers of plastic to oxygen, speeding up their own yellowing.
To do this, purchase 3% hydrogen peroxide and pour it into a clear, open container. Make sure the container is big enough to completely submerge the plastic item. Place the discoloured plastic in the container, ensuring it is fully covered by the liquid. Place the container in direct sunlight for several hours. If you don't have access to direct sunlight, you can use a UV lamp indoors.
Alternatively, you can use a hair cream designed for bleaching hair that contains 9-12% hydrogen peroxide. Put on a pair of thick rubber gloves and place the plastic on a stable work surface with a towel underneath it. Dip a paintbrush with natural bristles into the peroxide cream and brush it directly onto the discoloured areas. Continue applying the cream until there is a thick layer covering every discoloured section.
It is important to note that hydrogen peroxide may not be suitable for all plastics, especially toys that children may put in their mouths. Additionally, be careful not to let the cream peroxide dry up, especially under the hot sun, as it will cause an irreversible bleaching effect.
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Use a heat gun to restore colour
Using a heat gun to restore the colour of faded plastic is an economical and convenient solution. This method offers a high degree of control over the intensity and direction of the heat, allowing you to manage it according to specific restoration needs.
To begin, set your heat gun to a low setting, usually around 200°F (93°C). Keep the gun 4–6 inches away from the plastic surface and move it around in small sections. Shake the nozzle back and forth, distributing the heat evenly to prevent the plastic from warping or burning. Observe the reaction—the faded plastic should gradually darken. Once you've achieved the desired colour, move on to the next section, repeating the process until the entire plastic surface is restored.
It's important to note that this method is temporary, and the colour will eventually fade again. The heat brings the oils in the plastic to the surface, and with each heat cycle, the oils will deplete over time. Additionally, the plastic becomes more brittle with each treatment, increasing the chances of cracking and breaking.
This technique is particularly effective for vehicle plastics, as it melts away the discoloured layer caused by sun exposure and trapped dirt. It's also suitable for treating tougher stains, such as tea cup stains on varnished surfaces.
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Use a UV-resistant sealant to protect plastic from sun damage
Sunlight can be a significant source of energy, but it can also cause severe damage to plastic materials. The sun's ultraviolet (UV) rays can lead to colour fading, material degradation, and structural weakening over time. To prevent and reduce sun damage, you can use a UV-resistant sealant, which offers the following benefits:
Longevity and Preservation
UV-resistant sealants are designed to protect plastic surfaces from premature ageing and degradation caused by UV exposure. By creating a barrier that blocks out UV rays, these sealants help preserve the original colour and finish of the plastic, preventing discolouration and fading. This maintenance of aesthetic appeal is particularly important for outdoor structures, vehicles, boats, and outdoor furniture, where sun exposure is more prominent.
Enhanced Durability and Structural Integrity
The use of UV-resistant sealants reinforces the strength and integrity of plastic materials exposed to sunlight. By reducing the risk of cracking, warping, and brittleness, the sealants enhance the durability of the plastic. This added durability is crucial for maintaining the functionality and performance of plastic products, especially those used in construction, automotive, and consumer goods industries.
Cost Savings and Protection
Applying UV-resistant sealants can extend the lifespan of plastic items, reducing the need for frequent repairs or replacements. This not only saves costs but also ensures that your plastic possessions remain protected from the elements. The sealants act as a safeguard against the sun's harmful rays, ensuring that your plastic items maintain their structural integrity and visual appeal.
Application Techniques
When applying a UV-resistant sealant, it is essential to follow specific steps for effective results. Firstly, ensure that the plastic surface is clean and dry to facilitate proper adhesion. You can then apply the sealant evenly using a brush, roller, or spray gun, following the manufacturer's instructions. For better coverage and durability, consider applying multiple thin coats rather than a single thick coat. Finally, allow the sealant to dry and cure according to the recommended timeframe before exposing the item to sunlight.
By understanding the benefits of UV-resistant sealants and applying them correctly, you can significantly prolong the lifespan and appearance of your plastic items, protecting them from the sun's damaging effects.
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Use a paint designed for plastic to cover discolouration
Painting plastic is a great way to revive and extend the life of plastic items. If other methods of restoring discoloured plastic have not worked, you can use paint designed for plastic to cover discolouration.
Before painting, ensure that the plastic is suitable for painting. Older plastics can become brittle, so check that the plastic is sound. You can then perform a 'health check' by replacing any leaky gaskets and joiners on guttering, and fixing or replacing any faulty furniture on plastic doors and windows.
Next, prepare the plastic surface for painting. If the plastic has a glossy finish, sand the plastic to a matte finish using sandpaper. This will help the paint adhere to the plastic. You can also apply a plastic primer to the plastic before painting to further prevent the paint from peeling.
Once the surface is prepared, you can begin painting. Use masking tape to cover any surfaces that you don't want to paint. You can use a brush and an acrylic paint designed for plastic, but this may leave brush marks. Alternatively, you can use spray paint. Hold the can between 8 and 12 inches away from the plastic, with the can tilted at about a 45-degree angle. Apply a light, initial tack coat of about one-third to one-half coverage, then add more coats, allowing proper drying time between layers. Move the spray can forward as you spray to avoid spray dust.
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Frequently asked questions
Faded plastic colour can be restored using a variety of methods, including vinegar spray, heat guns, and hydrogen peroxide.
A vinegar spray is an easy and environmentally friendly way to restore discoloured vinyl plastic.
Set the heat gun to its lowest setting and hold it 4-6 inches away from the plastic. Move it in small sections, shaking the nozzle back and forth until the plastic returns to its original colour.
Commercial products such as Solution Finish and TriNova Plastic & Trim Restorer can help restore car plastic colour and include UV protection to shield against further sun damage.
Applying a UV-resistant sealant will protect plastic from sun damage and help lock in colour. Products like Graphene VRT or 303 Aerospace Protectant form a protective barrier that blocks ultraviolet rays.
