I happen to own a Drover coat straight from Aussie land. When I took it out of the closet today I almost had a stroke cause it was covered with 1000s of mold spots. Got in touch with Mouse & she suggested I Google Dryzabone and I got a great surprise on the cure for my coat.
Just hang it out in the carport and hose the sucker with water & let dry. I was relived to say the least.
Bob got me this coat along with an outback hat to match, when he went to Austrailia many years ago. My hat is brown & made from Roo while the coat is black. I wear the hat but rarely the coat cause it is heavy & just too much for Florida weather.

And when they say heavy, they mean heavy.