Smartphones have become the single most frequently handled product of modern life — and that means they also accumulate scratches faster than ever. Even with good screen protectors, front glass panels still become dull, worn, and visibly damaged over time.
For repair shops and refurbishment businesses in the UK, customer requests for “scratch removal” and “screen restoration” have grown rapidly, especially within the trade-in and second-hand market.
1. What Is the TBK-938S Smart Screen Polisher?
The TBK-938S Smart Screen Polisher is TBK’s newest polishing machine designed specifically for restoring mobile phone screens and smartwatch displays. Compact, intelligent, and fully automated, the 938S uses high-precision wet grinding technology to remove surface scratches, blend down deeper abrasion marks, and restore the glossy finish of the original factory glass.
Its upgraded polishing chamber, digital touch-screen control panel, intelligent timer, and simplified workflow make it suitable not only for professional repair engineers but also for refurbishment centres, recycling companies, and small repair shops looking to expand their service offerings.
Core highlights from the product page include:
- Mini body design — small footprint, ideal for desktop use
- Automatic scratch polishing — removes scratches and restores smoothness
- Simple one-button operation — beginner-friendly
- Intelligent control system — adjustable polishing strength and time
- Professional accessories — polishing mold, waterproof glue, polishing powder, blanket, and pressure module
- Before & after results — dull, scratched screens become glossy again
The TBK-938S is positioned as a new-generation income-boosting tool for UK repair businesses who want to offer premium restoration services without needing high-cost replacements.
2. Why the TBK-938S Matters: Have You Ever Been Annoyed by a Scratched Phone Screen?
2.1 Scratches Happen to Everyone—Even If You’re “Careful”
No matter how careful you are, small scratches still show up from keys, coins, bags, or just daily use.
And once the screen catches the light… those marks become impossible to ignore.
2.2 Screen Replacement Feels Like Overkill (and Too Expensive)
Replacing a full screen because of cosmetic scratches? Most people don’t want to pay £150–£300 for something that technically still works.
So shops often hear: “It’s only scratched… can’t you just fix the surface?”
And this is exactly the gap TBK-938S fills.
2.3 UK Trade-In Shops Lose Money Because of Scratches
A scratched screen can downgrade a phone from A-grade to B or C-grade, cutting the resale price significantly. Refurbishers, wholesalers, and repair shops are actively searching for a way to restore the original shine without replacing the display.
2.4 Not Everyone Wants a New Phone—They Just Want It to Look New
The UK market is leaning toward sustainability and repair culture.
People want affordable solutions to make their phones look fresh again instead of buying new ones.
A quick polishing service meets this need perfectly.
2.5 Traditional DIY Polishing Doesn’t Work
Toothpaste, baking soda, powders…
They don’t restore the glass — sometimes they even make it worse.
Shops need a safe, professional, and repeatable polishing solution.
2.6 The TBK-938S Gives Repair Shops a New, High-Margin Service
- Consumables are cheap
- A polishing job takes around 10 minutes
- Shops can charge £20–£50 easily
- Customers love same-day results
- No need for expensive screen replacements
The TBK-938S lets any repair shop offer a “screen refresh” service that feels premium but costs little to operate.
3. TBK-938S Smart Screen Polisher – Complete Operating Workflow
Below is the full, professional procedure for operating the TBK-938S single-station screen polishing machine, based on the official product guide and illustrated workflow.
1. Pre-Operation Preparation
1.1 Check the Machine
- Ensure the machine is placed on a flat, stable surface.
- Confirm the rear water tank is filled and the water pump is working properly.
- Inspect the polishing mold, pressure module, and polishing blanket for damage or wear.
1.2 Prepare the Phone
- Remove the mainboard and battery to avoid water-vapor risk.
- Clean the phone screen surface to remove dust, fingerprints, or debris.
2. 9-Step Polishing Workflow
Step 1 — Insert the Phone into the Polishing Mold
Place the scratched phone into the dedicated mold, ensuring the screen fits firmly and the sealing ring is intact to prevent water leakage.
Step 2 — Apply UV Waterproof Glue
Apply a thin, even layer of UV waterproof glue around the edges of the screen.
This prevents moisture from entering underneath the display during polishing.
Step 3 — Perform UV Curing
Place the phone into a UV curing box for approximately 20–30 seconds until the glue forms a solid waterproof barrier.
Step 4 — Install the Mold into the Polishing Machine
Insert the entire mold into the TBK-938S polishing chamber, securing it in place.
Step 5 — Install the Pressure Module
Place the metal pressure module directly on top of the mold.
This ensures consistent pressure and smooth grinding during polishing.
Step 6 — Place the Water Suction Pipe
Insert the water suction pipe into the water bucket so the pump can deliver a continuous water flow to the polishing area.
Step 7 — Add Polishing Powder & Start Polishing
- Add polishing powder according to the recommended water ratio (approximately 1:15–1:20).
- Close the machine lid.
- Select polishing time based on scratch severity:
- 5 minutes — Light scratches
- 10 minutes — Medium scratches
- 15 minutes — Deep scratches
The machine will automatically handle water circulation, pressure, and grinding.
Step 8 — Remove the Phone & Clean
After polishing is completed:
- Open the lid
- Remove the phone
- Wipe away remaining water and polishing residue with a clean cloth
Step 9 — Finished Result
The polished screen returns to a smooth, glossy condition with visible scratches reduced or removed.
The surface glass becomes level again, restoring a “like-new” appearance.
4. Troubleshooting Guide
Issue: Water pump not working
Possible causes:
- Blocked pump inlet
- Damaged pump
- Bent or clogged tubing
Solution: Inspect and clean the inlet, straighten tubing, or replace the pump.
Issue: Water leakage or wet internal components
- Check mold sealing ring
- Ensure waterproof glue was applied correctly
- Confirm machine is placed level
Issue: Poor polishing performance
- Incorrect polishing powder ratio
- Worn polishing blanket (replace regularly)
- Polishing time is too short — extends duration for deeper scratches
5. Key Features & Technical Highlights
5.1 Mini Desktop Design
- Compact footprint
- Easy to move and place on any workbench
Ideal for small shops or mobile technicians.
5.2 Full Scratch Polishing Capability
The machine can polish:
- Phone screens
- Smartwatch screens
- Flat or slightly curved glass
It thins the surrounding glass to match scratch depth, restoring smoothness.
5.3 Intelligent Touch-Screen Control
Features include:
- Countdown display
- Used-hours counter
- Scratch level selection
- Switching between EN / CN languages
- Lighting control
- Water pump activation
A fully digital interface ensures easy operation.
5.4 Professional Polishing Accessories Included
- UV waterproof glue
- Polishing mold
- Polishing powder
- Fingerprint oil
- Polishing blanket
- Manual glue gun
All required supplies come ready for immediate use.
5.5 Recommended Workflow Package
The 938S pairs well with other TBK equipment:
- 605 UV curing box
- 983B automatic dispensing machine
- 207 air tightness detector
- 209 bracket holder
This forms a complete refurbishment workstation.
5.6 Packaging & Delivery
The TBK-938S is shipped in a secure wooden box, complete with:
- Polishing machine
- Booster module
- Power cable
- Set of hex wrenches
- Polishing blanket
Each unit is checked for safety and performance before dispatch.
6. FAQs: Common Questions From UK Repair Shops
Q1: Can the TBK-938S remove deep scratches?
Yes — for deeper scratch marks, select the 15-minute polishing mode. Severe gouges may require repeated cycles.
Q2: Does polishing affect waterproofing or Face ID?
The UV waterproof glue ensures liquid does not enter the phone. Polishing does not directly affect Face ID or internal components.
Q3: Is polishing risky for OLED displays?
No. The machine uses water-based grinding and controlled pressure, protecting the display while restoring the surface.
Q4: How long does one polishing job take?
Between 5–15 minutes, depending on the severity of scratches.
Q5: What is the average profit per polishing service?
Most UK shops charge £20–£50 per polishing session, while material cost is only £1–£3, making it highly profitable.
Q6: Are molds available for all phone models?
Yes — TBK provides molds for iPhone, Samsung, and other major brands.
7. Conclusion: A Must-Have Machine for UK Repair Businesses
The TBK-938S Smart Screen Polisher is more than a scratch-removal device — it is a business-growth tool designed for the evolving UK repair and refurbishment market. With rising device prices and increased demand for second-hand retail, customers prefer restoration over replacement.
If your business offers repair, refurbishment, trade-in services, or second-hand sales, the TBK-938S can dramatically improve customer satisfaction and revenue opportunities.
8. Inquiry & Pre-Order Invitation (For UK Agents, Shops, and Wholesalers)
The TBK-938S is now available for UK pre-orders and wholesale distribution.
👉 To request pricing, MOQ, or distribution opportunities, directly contact us:
Telephone: +44 (0)29 2036 0596Email: customerservice@digi4u.co.ukOfficial Website: https://www.digi4u.co.uk
Our team will reply with a personalised quotation and availability.
