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Case study · Paint correction

We taped the bonnet and polished one half.

A black Honda HR-V came in carrying the swirl marks you get from a few years of ordinary washing. We taped a line across the bonnet, corrected one side of it, and left the other side exactly as it arrived — so the owner could see the difference before we carried on with the rest of the car.

Car
Honda HR-V
Colour
Black
Work
Machine paint correction
By
Zavier Han
Studio
Paya Ubi, indoors
A black Honda HR-V bonnet masked with yellow tape: the polished side above the tape reflects cleanly, the untouched side below is covered in circular swirl marks Machine polished As it arrived

Same panel, same lights, same camera. The only thing that changes across that yellow line is the polishing.

What you are actually looking at

Those circular marks are not dirt, and they are not in the colour. They sit in the clear coat — the hard transparent layer over the top — and each one is a scratch fine enough that you’d never feel it with a fingertip. There are thousands of them, and they arrive one pass at a time: the sponge, the cloth, the automatic car wash, the drying towel.

You only see them when a strong point of light hits the panel. That’s why they show up under the studio downlights, under a petrol station canopy and in direct sun, and why they seem to vanish on a cloudy day. Each scratch catches the light and throws it off at an angle instead of reflecting it straight back, so the panel reads grey and cloudy instead of black and deep.

Black shows this worse than any other colour, because there’s no brightness in the paint to hide behind. On a black car every scattered ray is visible against a dark background.

Why a wash or a wax won’t fix it

A wash removes what’s sitting on top of the clear coat. These marks are cut into it, so a wash can’t reach them. A wax or a glaze fills them for a week or two and the car genuinely does look better — that’s what a wax is for, and we sell good ones. What it can’t do is take them out.

The only thing that removes them is taking a very small amount of clear coat off, evenly, until the surface is level with the bottom of the scratches. That’s machine polishing, and it’s the slowest and most skilled part of any detail. It’s also the step most often left out.

Coat a swirled car and those swirls sit under the coating for as long as the coating lasts.Why correction comes first

Before and after, around the whole car

The tape line proves it on one panel. These two clips were filmed on the same car, in the same bay, under the same lights — the first before correction, the second after. Watch the edges of the reflections: soft and smeared in the first, hard and legible in the second.

Before
After

Tap either clip to play or pause. Number plates and faces are kept out of frame or blurred for our customers’ privacy.

How the job runs

Five steps, no shortcuts.

Inspect

Paint depth and defect check under proper lighting.

Decontaminate

Safe wash, clay and iron-fallout removal.

Correct

Machine polishing to the agreed finish.

Coat

Genuine Angelwax ceramic, cured indoors.

Collect

Handover walkthrough + aftercare kit.

More from the floor

Other cars we’ve had in.

See the full gallery →
Grey Honda Civic hatchback detailed at Thirty3
Close-up of a corrected blue BMW rear quarter
Singapore GP single-seater race car detailed at Thirty3
Dark blue Porsche 911 after paint correction
By appointment

Not sure what’s in your paint?

Send us a photo of your bonnet in the sun and we’ll tell you honestly whether correction is worth it on your car.

Message Thirty3 on WhatsApp →