Before you can get the quest to meet Vatudun, you need Knowledge on (Shaking, Drying, Filtering, Grinding, Heating, Chopping) - Beginner. You get those through some quests in Heidel. You also need Gathering Skilled 10 or above, and Processing Professional 5 or above.
You get the quest to talk to Vatudun from the Villager working the bellows behind the Arms Dealer in Keplan - Andria.