A smartphone is a device that we use every day, constantly holding it in our hands and putting it in our pockets or bags filled with keys and small change. Over time, even the most durable Gorilla Glass or oleophobic coating loses its original appearance, becoming covered with a network of small scratches or receiving deep chips. For many owners of Android devices, this becomes a serious aesthetic problem, reducing the pleasure of using the gadget and its market value.
Fortunately, there are many ways to restore the former beauty of your device without contacting expensive service centers. Coating restoration can be done either with improvised means or with the help of specialized chemical compounds. It is important to understand the nature of the damage: superficial abrasions can be easily removed, while deep cracks require more radical measures or complete glass replacement.
Before taking active action, it is necessary to assess the scale of the disaster. A deep scratch that can be felt with your fingernail may indicate damage not only to the protective layer, but also to the display itself. In such cases, aggressive polishing can only aggravate the situation by disrupting the pixel structure or damaging the touch layer.
Diagnostics of the type of damage and risk assessment
The first step in the restoration process is a thorough inspection of the surface under good lighting. Often, what appears to be a serious crack turns out to be simply an accumulation of dirt in microcracks in the oleophobic layer. Gently wipe the screen with an alcohol wipe or soft microfiber cloth to ensure that there is an actual physical defect.
If the damage only affects the top layer of glass, you can safely proceed to polishing. However, if the scratch is deep and the inner layer of the display is visible, any manipulation with abrasives can lead to dust getting inside the matrix or breaking the seal of the case. In the case of AMOLED screens the risk of damage to the crystal structure under pressure is especially high.
⚠️ Attention: If the scratch goes through the entire screen and is accompanied by the appearance of colored stripes or non-functioning sensor areas, polishing is useless. In this case, a complete replacement of the display module is required.
It is also worth considering the case material. Metal frames, such as the aluminum on flagship models Samsung Galaxy or Xiaomi Miare polished differently than the plastic backs of budget devices. Plastic easily melts from friction and chemical exposure, which can lead to the appearance of cloudy spots instead of a transparent gloss.
Using toothpaste to remove minor abrasions
The most accessible and popular method, which is often mentioned on the Internet, involves using regular toothpaste. This method is exclusively suitable for removing micro-scratches and restoring gloss on plastic surfaces or protective films. To work, you will need a paste with a whitening effect, as it contains small abrasive particles necessary for grinding.
Apply a small amount of paste to a cotton pad or soft, lint-free cloth. Using circular movements with light pressure, treat the damaged area for 2-3 minutes. Do not allow any substance to get into the charging connectors, speaker or microphone, as moisture and abrasives can cause corrosion of the contacts or clogging of the meshes.
- 🦷 Use only white paste without colored granules and gel structure.
- 💧 Wet the cloth with a minimum amount of water so as not to flood the electronics.
- 🧼 Carefully remove any remaining product after the procedure with a damp cloth.
The effectiveness of this method is limited. You won't be able to remove a deep groove, but you can make the network of small abrasions that create a "dull" effect on glossy glass less noticeable. After the procedure, be sure to apply a new protective glass, since the old oleophobic coating will be partially removed during the grinding process.
Before starting work, cover all the holes of the smartphone (speaker, microphone, connectors) with masking tape to protect them from abrasive dust and moisture.
Polishing with special compounds and GOI paste
For more serious problems, when toothpaste is powerless, there are professional remedies. Paste GOI (chrome oxide) is a Soviet invention that is still actively used by craftsmen for polishing metal and glass. It is produced in four numbers, where the fourth number is the roughest, and the first is the finishing one.
The polishing process with GOI paste requires patience and accuracy. First you need to prepare the surface by clearing it of fat. Then the paste is applied to a felt tip or thick cloth and rubbed over the scratch. Movements should be monotonous and directed in one direction so as not to create new chaotic abrasions.
The modern market offers special kits for repairing smartphone glass, such as Displex or polishes from Mother's. These products are developed taking into account the specifics of tempered glass and contain components that not only grind, but also fill microcracks.
| Mean | Surface type | Efficiency | Difficulty of use |
|---|---|---|---|
| Toothpaste | Plastic, film | Low (only micro scratches) | Low |
| GOI paste No. 2 | Glass, metal | Medium (deep scratches) | High |
| Displex polish | Display | High (filling cracks) | Medium |
| Soda + water | Glass | Low/Medium | Low |
When working with chemical polishes, it is important to follow safety precautions. Vapors from some formulations can be toxic, so work should be carried out in a well-ventilated area. In addition, excessive zeal can lead to thinning of the glass at the polishing site, which will make it vulnerable to future impacts.
The nuances of working with GOI paste
Before application, GOI paste is often recommended to be ground with a few drops of engine oil or Galosh gasoline for better distribution of the abrasive. However, it is dangerous to use oil when working with a smartphone; it is difficult to remove from the dynamic mesh. It is better to use dry polishing or a minimal amount of water.
Folk methods: soda, vegetable oil and other means
On the Internet you can find a lot of exotic tips, from using baby powder to banana peels. One of the relatively working folk methods is a paste of baking soda and water. Mix the ingredients in a 2:1 ratio until thick sour cream and apply to the damaged area.
Soda acts as a mild abrasive. It is less effective than specialized products, but is safer for oleophobic coatings for short-term exposure. After treatment, carefully wipe the screen so that white deposits do not get stuck in the cracks between the case and the glass.
Vegetable oil or baby cream does not physically remove scratches, but can temporarily mask them. The fatty substance fills the depressions, refracting light so that the defect becomes less noticeable. This solution is suitable as a temporary measure before selling the phone or waiting for a new screen.
- 🥥 Coconut oil has good viscosity and lasts longer in cracks.
- 🍼 Baby cream is safe for the skin of the hands, but may leave streaks on the screen.
- 🍌 Banana peel contains natural oils, but the effect lasts only a few hours.
You should not experiment with aggressive solvents, such as acetone or alcohol in high concentrations, on plastic parts of the case. They can instantly melt the polymer structure, leaving matte stains that cannot be removed. These products are safe for metal, but they are destructive for the display.
Restoring the oleophobic coating after polishing
Any polishing, even the most gentle one, inevitably removes the factory oleophobic coating. This is a special nanolayer that repels fat and water, allowing your finger to glide easily across the screen. Without it, the display will quickly get dirty, and swipes will become tight and unpleasant.
You can restore the coating at home using special liquids sold in electronics stores, for example Jack Platinum or analogues. The application process requires a perfectly clean surface. First, the screen is degreased with alcohol, then the liquid is applied in a thin layer and rubbed with microfiber.
Heat is often required to polymerize the composition. Some instructions recommend placing the phone on a warm (not hot!) surface or using a hair dryer on the lowest setting for a few minutes. This helps the coating molecules to adhere more firmly to the glass.
⚠️ Attention: Do not apply the oleophobic coating in a thick layer. Excess liquid will create a lens effect and rainbow stains, which will interfere with the view and reduce image clarity.
An alternative to liquid coating is to install high-quality protective glass with a factory-applied oleophobic layer. This will not only hide the remnants of small scratches under the adhesive layer, but will also return the tactile sensations of a new device.
☑️ Algorithm for restoring the oleophobic layer
When polishing is powerless: radical measures and replacement
There is a limit to the possibilities of restoration. If the scratch is deep, extends from edge to edge, or is located in the active sensor area, polishing can lead to distortion of the image ("lensing") or complete failure of the touchscreen. In such cases, saving on repairs can backfire.
Replacing external glass (re-gluing) is a complex technological process that requires a separator to separate broken glass and the matrix, as well as a laminator to remove air bubbles when gluing new glass. It is almost impossible to do this at home without special equipment.
Most often, technicians suggest replacing the entire display module assembly. This is more expensive, but guarantees no problems with sensitivity and picture quality. For budget models, the cost of the module can be a significant part of the price of the phone itself, which makes repairs economically unfeasible.
If you decide to sell a phone with scratches, be honest with the buyer. An attempt to hide deep defects by polishing is often revealed upon closer inspection from an angle, which can lead to the return of the product and a conflict. It is better to reduce the price or offer the option of replacing the glass at the seller’s expense.
Deep scratches on the matrix cannot be polished. An attempt to eliminate them will lead to the appearance of white spots and highlights, so in such cases only replacing the screen helps.
Is it possible to remove scratches on a smartphone camera?
Camera glass is usually thicker and stronger, but it is also more difficult to polish due to its small area. Use only special pastes for optics. Regular toothpaste can scratch the inside of the lens if the abrasive gets into the gap between the glass and the body.
Is polishing harmful to the phone's sensor?
Yes, excessive pressure and heat during polishing can damage the sensitive layer of the sensor. This will lead to the appearance of “dead zones” where the screen stops responding to touches, or to chaotic responses (phantom clicks).
How to distinguish a scratch on glass from a scratch on film?
Try to pry the edge of the damage with your fingernail. If you feel snagging and see material peeling off, the protective film is likely damaged. Glass “retracts” scratches; they are smooth to the touch, if not very deep.
Will UV glue help hide scratches?
UV glue used for gluing glass can actually fill small cracks and make them less noticeable due to the refraction of light. However, this is a temporary solution, and over time the glue may turn yellow or peel.
Is it safe to use car headlight polish on your phone?
Absolutely not. Headlight polishes contain large abrasives and aggressive chemical components designed for thick polycarbonate or headlight glass. They will instantly destroy the oleophobic coating and can seriously damage the smartphone matrix.