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Feature
Car care
·
7 min read
Why brushes are the reason your black car looks grey
The swirl marks in dark paint almost never come from dirt. Here is what a tunnel brush actually does on the way through, and what we use instead.

Sami Okoiro
August 19, 2026

Feature
Car care
·
7 min read
Why brushes are the reason your black car looks grey
The swirl marks in dark paint almost never come from dirt. Here is what a tunnel brush actually does on the way through, and what we use instead.

Sami Okoiro
August 19, 2026
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Ready when you are?
Type a postcode and we will show the slots we can still fill today.
Try Washio once. Cancel anytime.
Fixed price agreed before we arrive
Free re-rinse if it rains in 48 hours
Photo report after every wash

Ready when you are?
Type a postcode and we will show the slots we can still fill today.
Try Washio once. Cancel anytime.
Fixed price agreed before we arrive
Free re-rinse if it rains in 48 hours
Photo report after every wash





