I would not wear my kilt to a job interview unless it was relevant to the job required. I have to admit it is only appropriate to wear a kilt in a non working environment.
Most companies including mine want a commitment to the vacancy and willingness to be part of a Team - wearing kilt sends out a mixed view on commitment.
Even in Scotland few businesses require emplyees to wear a kilt so even there it would not be adviable for an interview.