Paint Correction
What Causes Swirl Marks On Car Paint
Almost every swirl mark on your car was put there during a wash, and most of them by someone trying to look after it. Here is how it happens.
By Alofaina Leaga5 Minute Read
Swirl marks are the fine circular scratches that show up in sunlight and make paint look hazy and tired. Almost all of them come from washing and drying rather than from the road, and most were put there by someone trying to look after the car.
The Mechanism
Dust and road grit sitting on paint is abrasive. Anything dragged across the panel while that grit is still there pushes it along the surface, and it cuts a scratch as it goes.
That is the whole explanation. Every cause below is a variation of the same thing.
Where They Come From
Automatic Car Washes With Brushes
By a distance the worst offender. Those brushes touch every car that goes through, and they carry the grit from all of them. Running that across your paint at speed puts in a huge amount of damage very quickly. If you take one thing from this article, it is to stop using them.
Single Bucket Washing
Washing with one bucket means the mitt goes back into the same water carrying the grit it just removed, picks it up again, and drags it across the next panel. The car gets cleaner and more scratched at the same time.
Washing A Dry And Dusty Car
Going straight in with a mitt on a car that has not been rinsed grinds whatever is sitting on it directly into the paint. A thorough pre rinse is what floats most of that away first.
Drying Badly
A huge share of swirls happen during drying. Dragging a chamois or a small towel across the panel with pressure, especially one that has been dropped, does exactly what the mitt does. Old bath towels are particularly bad.
Dusters And Dry Wiping
Wiping dust off a dry car with anything, including a proper microfibre, is dragging grit across dry paint. This is one of the most common causes of light swirling on garaged cars.
Bad Machine Work
Cheap cut and polish jobs that skip the refining stage leave straight parallel holograms rather than circular swirls. Same principle, different pattern.
How To Stop Adding More
- 01Never use an automatic wash with brushes.
- 02Rinse thoroughly before anything touches the paint.
- 03Use two buckets, rinsing the mitt between every panel.
- 04Work top down, leaving the dirtiest lower sections until last.
- 05Dry with a large clean drying towel and no pressure, or use a blower.
- 06Never dry wipe a dusty car. Rinse it instead.
- 07Keep wash media clean and off the ground.
Getting Rid Of The Ones You Have
Swirls are scratches in the clear coat, so nothing sitting on top will remove them. Glazes and all in one products fill them temporarily and they return within weeks.
Paint correction machines them out of the clear coat permanently. Following that with a ceramic coating makes the surface slicker and harder, so far fewer go back in.
Send Alofa photos of your paint in sunlight and he will tell you what it needs.
