Guide to Repairing Deep Scratches on Your Car
Genesis Paint Pro Expert
Coating Specialist
Deep scratches on your car’s paintwork look rough and can get worse fast. If a scratch goes through the clear coat and colour layer, bare metal gets exposed. That means rust, and rust means expensive repairs later.
The good news: with the right tools and method, you can get a professional-level finish at home. This guide shows you how to repair deep scratches using Genesis Paint Pro products, so your car stays protected and looks showroom-fresh.
What Counts as a Deep Scratch?
Not every mark needs the same fix. A deep scratch is different from a light scuff.
Scratch Type | How to tell | Risk if ignored |
|---|---|---|
Clear coat scratch | Catches your fingernail lightly, no colour change | Minor, can polish out |
Paint layer scratch | You see a different colour, usually white primer | Water gets in, dulls paint |
Deep scratch | You see silver metal or dark primer, catches nail easily | Rust, spreading damage, MOT issues |
If you can see bare metal, treat it as urgent. UK weather and road salt will make it rust quickly.
Why Repair a Deep Scratch Quickly?
Leaving it untreated does 3 things:
- Rust starts: Once metal is exposed, oxidation begins in weeks, especially in UK winter.
- Damage spreads: Moisture gets under the surrounding paint and causes bubbling or flaking.
- Resale value drops: Visible bodywork damage knocks hundreds off your car’s value.
Fixing it promptly with colour matched paint stops the damage and keeps your car looking sharp.
How to Repair Deep Scratches: Step-by-Step
You’ll need: Genesis Paint Pro Primer, Colour Matched Spray Paint, Clear Coat, 800/1500/2000-grit wet & dry sandpaper, masking tape, tack cloth, and polishing compound.
Step 1: Clean and Prep the Area
Wash the panel with car shampoo and dry it. Wipe the scratch with isopropyl alcohol or panel wipe to remove wax and grease. Next, feather the edges. Wrap 800-grit sandpaper around a small sanding block and lightly sand the scratch until the edges feel smooth. You are creating a keyed surface for paint to grip. Don’t go wide. Stay within 2cm of the damage. Finish with 1500-grit to refine.
Step 2: Apply Genesis Paint Pro Primer
If metal is exposed, primer is non-negotiable. It seals the metal and prevents rust. Shake the Genesis Paint Pro Primer for 2 minutes. Spray 2-3 light coats from 25cm away, allowing 10 minutes between coats. The goal is to just cover the metal. Let it cure for 30 minutes, then lightly flat with 1500-grit wet to level any texture.
Step 3: Spray Genesis Paint Pro Colour Matched Paint
Shake your Genesis Paint Pro spray can for 2 minutes after the mixing ball rattles. All our aerosols are mixed to your car’s OEM paint code for a perfect colour match. Apply 3-4 thin coats, not one heavy coat. Keep the can moving and overlap each pass by 50%. Wait 10-15 minutes between coats. Build the colour until the primer disappears and the level is just above the original paint. Leave it 30 minutes to flash off.
Step 4: Apply Clear Coat for Protection and Shine
Colour alone looks flat. Genesis Paint Pro Clear Coat gives UV protection and matches the factory gloss. Apply 2 medium coats over the base colour and blend 10-15cm into the surrounding panel. This helps the repair disappear. Let it cure for 24 hours. It will feel dry in an hour, but full hardness takes a day.
Step 5: Flat and Polish for a Seamless Finish
Once fully cured, the repair will sit slightly higher than the original paint. Use 2000-grit wet sandpaper with soapy water to carefully level it. Go slow. Wipe clean, then use a polishing compound on a soft cloth or DA polisher to bring back the gloss. The repair should now blend invisibly with the original paintwork.
Conclusion
Deep scratches don’t have to mean a bodyshop bill. With Genesis Paint Pro Primer, Colour Matched Spray Paint, and Clear Coat, you can stop rust and restore your car’s finish at home.
The key is patience: clean prep, thin coats, and proper curing time. Follow these steps and you’ll protect your car’s bodywork and value through every UK winter.
Shop the Genesis Paint Pro Deep Scratch Repair Kit – includes primer, colour matched paint, and clear coat in one box.