I just started my new job today, but in my previous job I wore a kilt to work very regularly.
I worked for The Abbey bank in the U.K. A part of Grupo Santander, one of the 10 largest banks in the world.
I regularly dealt with workers from other offices around the world visiting my building, shareholders visiting the office etc. Not once did I have a negative experience regarding my being kilted.
I did have four or five occasions where visitors to the building commented that I looked very smart and professional compared to some of the other staff, but that they felt I seemed very comfortable and accessible because I was wearing something unusual.