Does the car wash mud rust and damage the paint?

It won't hurt the paint. Some people say that the paint is damaged because of the following three conditions. The main reason is that the operation method is wrong.

The car body was not cleaned before wiping with car wash mud

There are sand particles on the side wiped by the car wash mud, which is not removed in time or pinched into the mud

Did not keep the paint surface wet when wiping

Car Wash Clay Red Pink Blue Magic Clay Bar Detailing Tool Auto Cleaner Handled