How to Wash and Maintain a Ceramic-Coated Car

A ceramic coating makes a car easier to keep clean. It does not make it self-cleaning, and it does not make the paint immune to bad washing. The coating on your car will look after the paint for years if the washing that happens on top of it is gentle and regular. This is the routine we recommend to our own coating customers, and it is the same one our valeting team uses.

The first days: follow the handover guide

Every correction and coating job leaves our studio with an aftercare guide, and the first thing it covers is the first wash. Follow that rather than a figure from a forum, because guidance is specific to the coating on your car. The coating we use, PPL Reign, has manufacturer guidance to keep it away from water in the hours after application while it cures, which is why the car stays in the studio in a controlled environment before it comes back to you. Once it is home, the practical rule is simple: no harsh chemicals, no automatic washes and nothing abrasive while the coating settles in.

Why washing technique matters more on a coated car

Most swirl marks in car paint were put there during washing: brush tunnels, dirty sponges, dry wiping and squeegees dragging grit across the surface. A coating is a hard, transparent layer, but it is thin, and it sits on paint that has just been corrected. Wash it badly and you will put swirls back into the surface you paid to have removed. Wash it well and the coating does what it was applied to do: water sheets off, dirt struggles to bond, and a wash that used to take an hour takes far less.

A routine wash, in order

The order matters. Doing it in the wrong sequence is how paint gets marred.

1. Park in the shade and let the car cool. Wash a hot panel and the water and shampoo dry before you can rinse them, leaving spots on the surface.
2. Pre-wash without touching. Rinse the car, then apply a snow foam or pre-wash and let it dwell for a few minutes before rinsing again. This lifts the heaviest grit before anything makes contact with the paint. The coating manufacturer recommends a low-pH pre-wash for this step.
3. Wheels, arches and tyres first. Clean them before the bodywork, with their own brushes and mitt, so brake dust and road grime never end up on the paint. Never let a wheel cleaner dry on in the sun.
4. Contact wash, top to bottom. Use a soft wash mitt and a pH-neutral shampoo. Work with two buckets, one for shampoo and one for rinsing the mitt, with a grit guard in the bottom, or a single bucket refilled with fresh water every wash. Do the roof and glass first and the sills and lower bumpers last, rinsing the mitt often. Straight lines, light pressure, no scrubbing.
5. Rinse thoroughly. Including shuts, badges and trim edges, where shampoo likes to hide.
6. Dry properly. A blower is best because nothing touches the paint. Otherwise use a clean, plush microfibre drying towel, laid on and lifted rather than dragged. Never dry with a chamois or an old towel, and never leave the car to air dry if the water is hard.

That is it. There is no need for a wax or a dressing over the coating. A dedicated coating maintenance spray used occasionally can help, but the coating itself is the protection.

What to keep away from it

• Automatic brush washes. They will swirl any surface, coated or not, and the brushes carry grit from every car before yours.
• Harsh traffic-film removers and acidic wheel cleaners. Strong chemicals can degrade a coating over time. Everything we use is LSP-safe, biodegradable and non-caustic for this reason, and your own products should be too.
• Dry wiping. Flicking dust off a panel with a cloth grinds it in. If it needs cleaning, wet it first.
• Clay bars. Clay is abrasive and the coating manufacturer specifically advises against claying a working coating. If the surface feels rough, that is a decontamination question, covered below.
• Pressure washers up close. Keep the lance well back from the paint and away from any film edges or trim.

Adjust the routine to how the car lives

A garaged car doing a few thousand miles a year can go a fortnight or more between washes with no harm done. A car that sits outside under trees, or commutes through winter salt, needs washing more often, not because the coating is weak but because contamination left on any surface eventually bonds to it. The things to deal with promptly, whatever the schedule:

• Bird lime and tree sap. Both are acidic and can etch through a coating if left for days in the sun. Soak with water or a quick detailer and lift gently. Do not scrub.
• Road salt. Rinse it off as soon as you can in winter, even if a full wash has to wait.
• Water spots. Caused by hard water drying on the surface. Dry the car properly and they rarely appear; if they do, deal with them early before they etch.

Decontamination: the part most owners miss

Even with careful washing, iron particles from brake dust, tar and industrial fallout build up on the surface over months. You feel it as a slight roughness when you run a clean hand over the paint after washing, and you see it as water that stops sheeting off the way it did. The answer is a chemical decontamination wash: iron remover and tar remover that dissolve the contamination without abrading the coating. For the coating we use, the manufacturer's guidance is liquid-only decontamination at regular mileage intervals rather than clay, and that is what our decontamination washes are.

How often depends on mileage and where the car lives. For most road cars a few times a year keeps the coating performing. If you are unsure whether the car needs one, ask us before doing anything abrasive.

When to ask for advice

Get in touch rather than experimenting if you notice any of these:

• Water sitting flat on the paint where it used to bead or sheet, even after a proper wash.
• A patch that looks dull, hazy or a different shade after something has been on it.
• Spots or marks that a normal wash does not shift.
• The surface feeling rough after washing.

Most of these are contamination and come off with the right wash. Occasionally they are something that needs looking at under studio lighting. Either way, the wrong product or a clay bar applied at home can turn a small job into a large one.

Where professional maintenance fits

Plenty of coating customers wash their own cars and enjoy it. Plenty do not have the time, the space or the water. Our Maintenance package exists for them: a scheduled safe wash, weekly, fortnightly or monthly, using the same products and the same method described above, with the decontamination washes a coated car needs built in. It starts from £60 a visit after an initial full valet, and it can happen at the studio or at your home or workplace from the mobile unit, which carries its own water.

If your car has paint protection film as well as a coating, the film has its own short list of care points, including how long to wait before the first wash and keeping pressure washers away from film edges. XPEL publishes those in its product care guidance, and we cover them at handover.

Whatever you decide, the principle is the same. The coating is doing its job. Your job is to wash the car gently, regularly and in the right order, and to ask before doing anything to it that you are not sure about.