I haven't worn a kilt to a job interview, but I'll give you an example of how it might work.
I was at a black-tie function with my partner. Every man in the place was wearing a black tux--except for myself, and the key note speaker. The latter wore designer blue jeans and a velvet jacket, and I wore my ancient hunting Matheson with my Argyll jacket. Later in the evening, the key note speaker approached me and told me that he thought I had chutzpah and that if I'd been looking for a job, he would have hired me first and asked questions later.
The man in question is the CEO of a major up-and-coming corporation, who has received awards for staff engagement, unconventional [and highly successful] marketing and customer interaction.
Wearing a kilt at the right time and place? Priceless.

If I had been out of work, I would have said: "See you bright and early Monday morning."