Oh, and by the way - We don't iron a kilt. We press. We use the heat from steam to soften the fibers and then press down - HARD.
We do not move the iron over the fabric. We press - lift - press. The basting is just to hold everything in place while we press. You will usually pull slightly, just enough to take the slack out of the fabric, the pleats to get the fabric to lay flat between the rows of basting.