To apply Tung oil, you need to first prep the surface. Next, stain the surface and then proceed to apply the oil. Tung oil may not be used to hydrate dried wood. In order to rehydrate dried wood, linseed oil may be used. It's however best to first consult a professional on what oil is best to rehydrate depending on the type of wood you have. Check out http://www.ehow.com/how_2187580_apply-tung-oil-finish.html.