Although putting a liner into a light kilt might save your blushes, I'd recommend that you also sew a tape or ribbon to the inside of the hem - it does make a difference to the stability of the kilt.

If the pleats are already sewn down you don't have to unpick them, just sew the tape to the fabric you can get to.

You could also try a control method used by the makers of military box pleated kilts. A length of elastic is sewn to just the inside of the pleats, about five inches from the lower edge. The elastic is long enough to allow the pleats to swing, but pulls them back into place if they get too unruly.

I have some lightweight fabric which I plan to use doubled, in order to test the method. It will also solve the problem of the material not having a proper 'kilting' selvage.

It will have to wait until I have worked my way through all the alterations I am doing - I just realised earlier today that I have my cotton 'Eight yards of Darkness' kilt taken apart and I need it tomorrow for a folk festival.

I have several kilts I started work on last winter to finish off for the colder months - though the temperature will have to drop before I can face having them on my lap. Perhaps I can fit the lightweight in before then.