Thankyou druidsgirl. Next time we go anywhere near Feilding, I'll visit Anna Gratton. And that alpaca looks lovely - I have seen some in my local yarn shop. They didn't have any washing instructions on the website that I could see, but I guess you'd wash it by hand.
Oh yes. I would wash by hand using a wool wash and dry flat out of the sunlight. Treat it like any natural fibre really.