Please... Do Not Wash or Detail

I created this to address my anxiety that my car will be washed while in for service. Whether it be my nicely detailed Mustang or my daily driver, I don't want it to go through an automated car wash or to be treated to a sponge and a bucket of gritty water. I try to remember to tell the service advisor that it should not be washed but that's not a perfect solution as it relies on that person recommunicating it.