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← Back to Screen Polishing Professional technician performing screen polishing process step by step
🔧 Repair Services: Screen Polishing

Professional Screen Polishing: Complete 4-Step Process Explained

How We Polish Screens - The Professional Process

At onoff.gr, we don't just do “polishing” - we follow a specific, professional process developed through years of experience and thousands of repairs. The most important part? We don't need to remove the screen! The entire process is performed with the device as-is, preserving its authenticity and safety.

Four-step screen polishing process diagram showing UV protection and mechanical polish stages

Why We DON'T Remove the Screen

  • Factory seal is preserved on the device
  • Zero risk of damage to internal mechanisms
  • Faster process - no time wasted on disassembly
  • Manufacturer warranty is preserved
  • Your data is 100% safe - we don't touch the motherboard

The Process Step by Step

1

Applying Waterproof Adhesive

The first and most critical step is protecting your device. We apply a special UV-curable waterproof adhesive around all openings, buttons, and sensitive areas.

Why do we use UV adhesive?

  • • Creates a completely waterproof barrier
  • • Only cures with UV radiation - we have full control
  • • Easily removed afterward without residue
  • • Does not damage the device in any way

We carefully seal the microphones, speakers, charging port, volume/lock buttons, and even the microscopic gaps between the screen and frame. Every detail matters!

2

UV Lamp Curing

We place the device in a professional UV lamp for 3-5 minutes. The ultraviolet radiation “solidifies” the adhesive, creating a rigid, waterproof barrier.

Technical Details:

  • • UV wavelength: 365-405nm (optically safe)
  • • Exposure time: 180-300 seconds depending on the model
  • • Operating temperature: 25-35°C (device doesn't overheat)
  • • Controlled intensity for uniform curing

Our UV lamp is specifically designed for smartphone repairs - it's not the kind used in nail salons! It has exactly the right wavelength and intensity to cure the adhesive without damaging the OLED/AMOLED screen.

3

Mounting in Mold & Mechanical Polishing

Now comes the main part! We place the device (with the fully protected screen) in a special mold that holds it steady and secure.

The Polishing Machine:

We use a professional polishing machine with rotating pads of varying roughness. It's not a regular “polishing machine” - it's specifically designed for smartphone screens with:

  • • Controlled pressure (0.5-2 kg/cm²)
  • • Adjustable speed (500-3000 RPM)
  • • Air cooling to prevent overheating
  • • Automatic stop in case of excessive pressure

Polishing Stages:

Stage 1 - Coarse Polishing

Using a coarse paste (3000-5000 grit) to remove the deepest scratches. This is where we “level” the surface.

Stage 2 - Medium Polishing

Medium roughness paste (7000-9000 grit) for smoothing and removing traces from the first stage.

Stage 3 - Fine Polishing

Very fine paste (12000+ grit) for mirror-like finish and final shine. The screen regains its glossy appearance.

Total polishing time: 2-6 hours depending on the depth and extent of the scratches.

4

Oil Application & Final UV Curing

The final step is equally important! We apply a special “sealing oil” (oleophobic coating) that:

  • ✅ Protects the screen from oiliness and fingerprints
  • ✅ Creates a waterproof surface (oleophobic + hydrophobic)
  • ✅ Preserves the shine achieved through polishing
  • ✅ Improves touchscreen responsiveness

What is Oleophobic Coating?

It's the same coating that all new screens come with from the factory! Through regular use, it gradually wears off - we restore it after polishing, bringing the screen back to its factory condition.

Final Curing:

We place the device back in the UV lamp for 2-3 minutes for the oleophobic coating to dry and stabilize. Meanwhile, we carefully remove the protective adhesive from step 1.

And the result?

A screen that looks almost brand new! The scratches have disappeared (or been dramatically reduced), the shine has been restored, and the touch feels smooth and natural. All of this without ever removing the screen from the device!

The Result: Before & After

Before and after comparison showing dramatic screen scratch removal results

As you can see, the difference is impressive! From a scratched-up screen to one that looks almost brand new. And the best part? You kept your original screen - we didn't replace anything!

Quality Control

What we check before delivery:

  • Visual inspection: Examination under light for any remaining scratches
  • Touch test: Testing all touchscreen points
  • Moisture check: Ensuring no moisture entered during the process
  • Cleaning: Removal of all paste and adhesive residues
  • Final function test: Brightness, colors, sound, buttons

When we reject the result:

  • If visible scratches still remain
  • If there are hazy areas
  • If the touchscreen doesn't respond perfectly
  • If there are material residues

Important: If we're not 100% satisfied with the result, we repeat the process or recommend replacement (with a discount for the attempt).

How Long Does It Take?

10-15 min

Applying waterproof adhesive & UV curing

2-5 hours

Mechanical polishing (3 stages: 3000/7000/12000 grit)

15-20 min

Applying oleophobic coating, final UV curing & cleaning

15-30 min

Quality control & final cleaning

Total time: 2-6 hours

(Depending on the model and extent of the scratches)

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