Plastic materials can fade and discolor over time due to exposure to sunlight, heat, and other environmental factors. This can make plastic surfaces look dull, yellowed, or weathered. Many people wonder if WD-40 can help restore the look of faded plastic and return it to its original color and luster. In this article, we’ll examine if WD-40 is an effective solution for restoring faded and discolored plastics.
What Causes Plastic to Fade and Discolor?
There are a few key culprits that contribute to the fading and discoloration of plastic over time:
- UV exposure – Prolonged exposure to ultraviolet rays from sunlight can cause plastic to break down on a molecular level. This leads to fading, yellowing, and brittleness.
- Heat – Exposure to heat sources like direct sunlight or high temperatures can accelerate the fading and weathering of plastics.
- Oxidation – Oxygen in the air reacts with the plastic polymer causing it to degrade and discolor.
- Chemical exposure – Cleaners, solvents, and other chemicals can stain and discolor plastic if allowed to sit.
- Normal aging – Plastics will gradually fade and lose vibrancy as part of the normal aging process.
These factors affect the plastic on a chemical level, degrading the polymer chains that give plastic its color and clarity. Over time, the plastic becomes more opaque and discolored as its structure breaks down.
Can WD-40 Restore Faded Plastics?
WD-40 is primarily known as a water-displacing spray lubricant. However, some people claim that it can also effectively restore faded and weathered plastic back to its original color. Let’s analyze if WD-40 is up to the task.
How Does WD-40 Work on Plastic?
WD-40 is made up of a low-viscosity oil base, as well as several petroleum distillates including aliphatic hydrocarbons and paraffins. It also contains anticorrosion additives. When sprayed on faded plastic, WD-40 helps fill in tiny cracks and pores that developed as the plastic aged. The oils help smooth damaged surface areas and renew glossiness.
In addition, WD-40 lifts and solubizes dirt and debris that may be contributing to the faded, weathered appearance. With grime removed, the plastic color can look richer and more vibrant.
Does WD-40 Permanently Restore Plastic Color?
The short answer is no. WD-40 does not permanently reverse the chemical damage to faded plastic. Its effects are temporary and superficial. The oils may rejuvenate the appearance for a short time, but they do not repair the broken polymer chains or permanently stop the fading process.
Regular use of WD-40 may help prolong the improved appearance, but it will not halt the inevitable fading and discoloration. The plastic will continue degrading and require repeated applications of WD-40 to maintain a refreshed look.
What Are Recommended Methods to Restore Plastic?
While WD-40 offers temporary restoration, there are a few other methods that can more effectively renew faded plastic long-term. Here are some recommended options:
Plastic Polishes and Cleaners
Specialty plastic polishing compounds work by chemically restoring the top layer of the plastic. Gentle abrasives smooth away oxidation and surface imperfections, while oils recondition and protect the plastic from further damage. Brands like Meguiar’s and Mothers offer plastic polish products that deep clean while adding glossy protection.
Targeted Plastic Restoration Kits
Companies like Solution Finish and Forever New produce targeted kits designed specifically to renew and restore discolored plastic. These kits often contain a polishing compound, prep solution, anti-static cloths, and protectant sealants formulated to revive faded plastics to like-new condition.
Hydrogen Peroxide Bleaching
A hydrogen peroxide cleaning solution of 1 part 35% hydrogen peroxide to 4 parts water can lift some discoloration from faded plastic. After testing on an inconspicuous area first, the solution is applied and allowed to sit for a few hours before rinsing. Hydrogen peroxide provides a mild bleaching effect to lighten yellowed plastic.
RetroBright Treatment
For severely discolored plastic, the open-source Retr0bright recipe of hydrogen peroxide, oxy powder, and baking soda can be an effective bleaching treatment. This helps de-yellow plastic from UV damage. However, Retr0bright requires caution and proper handling to avoid permanent marks or cracks in the plastic.
| Restoration Method | Process | Expected Results |
|---|---|---|
| WD-40 | Spray and wipe over faded surfaces | Temporary color improvement lasting days to weeks. Not permanent. |
| Plastic Polish | Thoroughly clean and polish plastic surface | Removes some oxidation and discoloration. Provides glossy protected finish. |
| Restoration Kits | Use specialized cleaners, polishes, and sealants | Can significantly improve color and clarify hazy plastic |
| Hydrogen Peroxide | Bleaching treatment. Rinse completely after application | Lifts some discoloration but doesn’t restore original color |
| Retr0bright | BLEACHING TREATMENT. Handle with extreme caution. | Dramatically lightens from UV yellowing. High risk of plastic damage. |
Tips for Using WD-40 on Plastic
While WD-40 alone won’t permanently restore faded plastics, it can offer a quick cosmetic fix in a pinch. If you wish to use WD-40 on plastic, keep these tips in mind:
- Spot test first on an inconspicuous area to check for any damage or discoloration.
- Apply a light mist and wipe with a soft cloth. Avoid excessive saturation.
- Buff gently to reveal the refreshed finish.
- Avoid using WD-40 on clear plastic like lenses, as it can leave oily haze.
- Reapply every 1-2 weeks if aiming to maintain the temporary restoration.
- Consider combining with a plastic polish or UV protectant spray for longer results.
- Do not use WD-40 on antique or delicate plastic that could yellow with oil contact.
Common Plastic Items Prone to Fading
Some types of plastic items are especially vulnerable to fading, yellowing, and deterioration over time. Common items that can degrade include:
- Plastic furniture – patio sets, chairs, tables
- Playground equipment – slides, jungle gyms, playhouses
- Outdoor decor – planters, deck boxes, flower pots
- Pool toys and accessories
- Car headlight covers and trim pieces
- Vinyl sidings and exterior fixtures
- Computer cases and electronics
- Bathtubs, shower stalls, bathroom accessories
- Refrigerator interiors and plastic liners
Any plastic constantly exposed to weather elements and UV light is at risk of eventual fading. With proper care, cleaning, and restoration, the life of these plastics can be significantly extended before replacement is required.
When to Avoid Using WD-40 on Plastic
While generally safe for most plastics, there are a few specific cases where you’ll want to avoid using WD-40:
- Antique or collectible plastics – WD-40 can potentially cause unwanted yellowing or chemical damage.
- Clear plastic covers – WD-40 residue can leave a permanent haze.
- Vehicle tail lights & lenses – WD-40 can diminsh clarity and create a film.
- Rubber trim or gaskets – Petroleum oils tend to degrade rubber over time.
- Future painting or refinishing – WD-40 leaves an oily residue that can interfere with adhesion.
- Electronics – Risk of contact failure or electrical shorts if solution gets inside.
When in doubt, check the plastic manufacturer’s recommendations before applying any chemical solutions.
Maintaining Plastic to Prevent Fading
While restoration is sometimes needed, prevention is the best medicine when it comes to plastic fading. Here are proactive maintenance tips to keep plastic looking its best:
- Avoid exposing plastics to direct sunlight when possible. Use shade structures or indoor storage.
- Clean regularly using mild soap and water to prevent buildup of dirt, grime, and oxidation.
- Apply UV-resistant vinyl protectants to create a protective barrier.
- Keep plastics away from heat sources that could accelerate distortion or fading.
- Check plastic fittings, seals, and gaskets periodically for cracks that allow in water and debris.
- Consider coats of automotive wax to provide glossy protection from elements.
- Rinse plastic after contact with chlorinated water from pools or cleaning products.
- Rotate outdoor plastics seasonally to allow even UV and weathering exposure.
With attentive care and maintenance, plastics can retain their as-new appearance and luster for many additional years before restoration is needed.
Conclusion
WD-40 can temporarily improve the appearance of faded, discolored plastic by filling surface imperfections and increasing glossiness. However, it does not permanently reverse the chemical damage causing the fading. For best results, combine WD-40 with targeted plastic polishes and protectants. Or invest in professional plastic restoration kits to renew plastic to a like-new condition. With proper maintenance and care, the onset of plastic fading can be significantly delayed.
