I'm going to be in Middle East to met up with a few friends. It's the first time I've been and they've told me off roading in the desert and other sand dune related activities are a lot of fun. Anyone know how sand resisitant a watch is? I'm told the sand is extremely fine, powder like. Much, much finer than what is found on a beach. Because of the abrasive nature of the sand, is there any danger of the sand working past the seals and getting into the movement?