It’s not the fault of the car wash. If the clear coat on the customers vehicle is failing the high pressure can remove the clear coat, it’ll peel off like an onion. Text the customer back and explain that you can’t be responsible for his failing paint/clear coat and it’s not the fault of the car wash or the equipment.
Just about every car bumper painted to match the car is plastic or rubber. The plastic isn't the issue. Did you read this thread in its entirety? The issue is getting under a rock chip and lifting the paint. You were most likely trying to pressure off a rock chip.When did they start making vehicles front bumpers out of plastic with the vulnerable coating over the plastic or was this just an exception????