Minor Scratches Happen — Here's How to Fix Them
Whether your part arrived with a few light surface marks from transit, or picked up minor scratches during normal use, the good news is that most light scratches and swirl marks on carbon fiber and ABS plastic can be removed by hand in under 30 minutes — with no polishing machine, no special skills, and no expensive detailing products.
This guide covers exactly what to do, step by step.
What This Works For
- ✅ Light surface scratches (you can feel them slightly with a fingernail but they don't catch deeply)
- ✅ Swirl marks and fine scuffs from transit packaging
- ✅ Light oxidation or dullness on gloss surfaces
- ✅ Fingerprint hazing on carbon fiber clear coat
This will NOT fix:
- ❌ Deep scratches that go through the clear coat or into the carbon weave / ABS material
- ❌ Cracks, chips, or structural damage
- ❌ Delamination of the carbon fiber surface
If you can catch the scratch with your fingernail and it feels like a groove, it may be too deep for hand polishing alone. Contact us with a photo and we'll advise.
What You Need
- A liquid car polish — any all-in-one polish or finishing polish from a brand like Meguiar's, Turtle Wax, or similar. Look for "scratch remover" or "finishing polish" on the label. Avoid heavy cutting compounds — you want a fine polish, not an aggressive one.
- 2–3 clean microfiber cloths — soft, lint-free. Do not use paper towels or regular cloths.
- Clean water and a rinse cloth (optional but recommended)
Total cost: under $15. Available at any auto parts store or online.
Step-by-Step: Hand Polishing Carbon Fiber or ABS
Step 1 — Clean the Surface First
Before polishing, wash the area with clean water and a microfiber cloth to remove any dust, dirt, or grit. Polishing over dirt will create new scratches. Allow to dry completely.
Step 2 — Apply a Small Amount of Polish
Put a small amount of polish — about the size of a 1 euro coin — onto a clean, dry microfiber cloth. Do not apply directly to the part. Less is more: you can always add more, but too much polish is harder to remove and can leave residue.
Step 3 — Work in Small Sections
Work on one small area at a time — roughly 20–30cm square. Using moderate pressure, rub the polish into the surface using straight back-and-forth strokes, not circular motions. Follow the direction of the carbon weave or the longest axis of the part where possible.
⚠️ Do not use circular motions — this creates new swirl marks. Always work in straight lines.
Step 4 — Let It Haze Slightly
After 20–30 seconds of rubbing, the polish will start to dry and turn slightly hazy or white. This is normal — it means the abrasives in the polish have done their work.
Step 5 — Buff Off with a Clean Cloth
Using a fresh, dry microfiber cloth, buff off the dried polish residue using light pressure and straight strokes. The surface should now be noticeably clearer and more glossy. If the scratch is still visible, repeat Steps 2–5 one or two more times on the same area.
Step 6 — Inspect and Repeat if Needed
Check the result in good lighting — natural daylight or a bright lamp held at a low angle works best for spotting remaining marks. For most light scratches, 1–2 passes is enough.
Step 7 — Apply a Protective Layer (Recommended)
Once you're happy with the result, apply a thin layer of car wax or a spray detailer with UV protection to the polished area. This seals the surface, restores depth to the gloss, and protects against future light scratches and UV yellowing of the clear coat. Buff off with a clean microfiber cloth.
Specific Notes for Carbon Fiber
- Carbon fiber parts have a clear coat layer over the weave — you are polishing the clear coat, not the carbon itself. This is the same as polishing car paint.
- Use only fine finishing polish — never a heavy cutting compound, as it can thin the clear coat over time.
- After polishing, always finish with a UV-protective wax or detailer. UV exposure is the main cause of clear coat yellowing on carbon fiber over time.
- Matte carbon fiber should not be polished with a gloss polish — use a matte-specific detailer instead to avoid adding unwanted shine.
Specific Notes for ABS Plastic
- ABS parts (bumper lips, splitters, trim pieces) respond well to the same hand polishing technique.
- For black unpainted ABS, a plastic restorer or trim dressing product will do more than polish — it restores the deep black color that fades with UV exposure.
- Avoid silicone-based dressings on ABS parts that will be painted or wrapped later — they can interfere with adhesion.
When to Contact Us
If the scratch is deep, the clear coat is cracked, or the carbon weave itself is damaged, hand polishing won't fix it. Send us a photo and we'll let you know whether a replacement or repair is the right path.
Summary
- ✅ Fine polish + microfiber cloth = all you need for light scratches
- ✅ Always clean the surface before polishing
- ✅ Straight strokes only — never circular
- ✅ Finish with UV-protective wax on carbon fiber
- ✅ Matte surfaces need matte-specific products
- ✅ Deep scratches or clear coat damage — contact us
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