Actually, a hot damp press is what you use for a kilt, and it won't shrink your kilt.

What shrinks the wool is temperature shocks coupled with agitation. So, the best way to shrink wool is to put it into hot water (which opens up the little plates on each wool fiber), mush it around a lot (walk on it, rub it, let the agitator in your washer beat it up), and then plunge it into cold water (which clamps the little plates down and locks in the new configuration). This is why your wool kilt hose get thick on the bottom if you wear them around a lot. And, it's also how wool felt is produced (although that's typically done from carded wool, not from woven fabric).

Cheers,

Barb