Rubber matting or carpet.

[Alan]

At the car factory where I worked all cars were road tested. Afterwards they went through a car wash, but having discovered that rotating brushes scratch paintwork this had only an array of high pressure jets. Came the day when the first prototype of a new drophead model came off the line, the proud tester took the car for its wash. All was going well until he pressed the wrong button. Down came the hood and of course the water jets had to complete their cycle. It’s 28 years ago. I still see him from time to time. Haven’t stopped laughing yet.