The two bucket method in winter: washing a salty car safely

Summer dirt is mostly dust. Winter dirt is grit and salt, held on by a greasy film, and it is far more likely to scratch. That makes winter the season when the two bucket method matters most. Here is how to adapt it for cold weather.

Why winter washing is riskier

• More grit. Roads are spread with rock salt, and tyres throw it up the sides of the car as a wet, gritty spray.
• A stickier film. Wet roads leave a traffic film that holds that grit in place on the paint.
• Less light and less time. Short days tempt you to rush, and rushing is when mitts get dropped and panels get missed.

What to change in winter

Get the grit off before you touch

In winter the hands off steps do most of the work.

1. Rinse the whole car, paying attention to the wheel arches, sills and lower doors where salt collects.
2. Apply No.01 Pre Rinse in the Winter formula at 1:10, from the bottom up. It has extra chelating power to lift road salt and winter grime. Leave it for 2 to 5 minutes and do not let it dry.
3. Cover the car in No.02 Snow Foam Winter at 1:15, let it dwell for 3 to 5 minutes, then rinse from the top down.

Our winter snow foam page covers the mix, and the snow foam guide covers the settings.

The two bucket wash, winter version

1. Fill WASH with No.05 Contact Shampoo Winter at 1:200, which helps neutralise road salt. Fill RINSE with clean water. Put a grit guard in each.
2. Start with the roof and glass and work down, one panel at a time, in straight lines.
3. Rinse the mitt against the grit guard after every panel. On the doors, rinse it halfway down as well.
4. Swap to a second mitt or a wash pad for everything below the door handles.
5. Look at the rinse water as you go. Change it when it turns cloudy, which in winter is often halfway round.
6. Rinse each section before it dries. Finish with a rinse from the top down and flush the arches again.
7. Dry the car straight away, including the door shuts and seals.

The full method is in our two bucket method guide.

Cold weather rules

• Avoid washing below freezing. Water can freeze in door seals and locks.
• Wash in the middle of the day, when the panels are at their warmest.
• Use lukewarm water in the buckets. It is kinder on your hands. Do not pour hot water over cold glass.
• Pick your day. The car wash weather checker looks at the temperature, wind and rain where you are.
• Wash your mitts and towels afterwards. Salt and grit that dry into the fibres are waiting for the next wash.

How often to wash in winter

Every week or two while the roads are being gritted, and sooner after a long motorway run. A quick wash often beats a long wash once a month, because the less time salt sits on the car, the better. Our winter car care guide covers the whole season, and road salt facts and figures has the numbers behind it.

Protect the paint between washes

A protected surface lets go of salt and dirt more easily, so the next wash needs less contact. No.08 Wax and Sealant in the Winter formula gives a tougher barrier for salt season. Apply it to clean, dry paint and top it up every few washes.

Quick answers

Kit for this job

• No.01 Pre Rinse and Bug Remover
• No.02 Snow Foam
• No.05 Contact Shampoo
• 20L Wash Bucket with Grit Guard, Two Bucket Kit
• Ultra Plush Microfibre Wash Mitt
• No.08 Wax and Sealant
• Winter Protection Kit

More from the Journal

• Winter car care in the UK: how to deal with road salt
• Road salt and your car: the facts and figures
• The two bucket method: how to wash your car without swirl marks
• Do grit guards work? What they do and how to use one