I found this stuff called "Force Out" odor removing spray. It came in a 30 oz spray bottle. It is odorless, non-toxic, oil, bacteria and enzyme free, non-allergenic, non-bleaching and non corrosive. A buddy of mine works at a hotel and he said they use it there to get the smoke smell out of their non-smoking rooms. He brought me a bottle to try.

I saturated both kilts in the spray, let them sit out in the sun until dry. I checked and could not smell the smoke, which had been really strong, even after 3 washings. Anyhow, I re-wet them with the spray and washed them. No smell at all!

Here is a link to the site for "Force Out" It is really good stuff!