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Washing a car without adding swirl marks

Almost every swirl mark on a domestic car was put there by a wash, not by the road. The order matters more than the equipment.

The equipment is secondary. This is the order.

1. Wheels first, with their own brush

Wheel grit is the coarsest thing on the car and the most damaging if it migrates. Separate brush, separate bucket, done before anything else.

2. Rinse the whole car, top down

A fan jet at a comfortable distance, never a rotary nozzle. The purpose is to remove loose grit before contact, not to clean.

3. Foam, and let it dwell

Thick foam that clings for a few minutes softens what remains. Foam that slides off in thirty seconds looks impressive and does nothing.

4. Rinse again, then touch the paint

Two buckets, a clean mitt, straight lines rather than circles, and never a mitt that has been dropped. A water-fed brush is fine on the body provided it has not been used on the wheels — grit trapped in bristles and dragged across a bonnet is the single most common cause of swirl marks.

What we recommend, and why

  1. Kärcher K 5 FJ

    145 bar · 500 l/h · 40 m²/h · 6.3 kg

    Five hundred litres an hour and a fixed handle: the point in the range where the machine stops being carried and starts being wheeled.

    Best for: A long drive, a large terrace or several vehicles — where flow rate, not pressure, sets the finishing time

    ≈ 250 €

  2. Kärcher K 3 FJ Home

    120 bar · Foam Jet nozzle · T 1 patio cleaner included

    The entry Kärcher, sold as a bundle with a patio head — which is the part that decides whether the machine gets used.

    Best for: A small courtyard, garden furniture and bikes, where the machine is used a few times a season

    ≈ 150 €

Questions people actually ask

Is a pressure washer safe on car paint?

At a sensible distance and with a fan jet, yes. Held close, or with a rotary nozzle, no — and never on a stone chip or a lifting lacquer edge, where the water gets underneath. Machines with adjustable pressure make this easier to get right, which is the practical argument for the Nilfisk Core here.

Do I need a foam cannon?

It is the accessory that does most for the paint, because foam clinging for a few minutes softens grit before anything touches the surface. A 3-in-1 wash brush is quicker and makes thinner foam. Either beats going straight in with a sponge.

The tool we use ourselves

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