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Roughly followed this recipe for the marinade; https://sixtwists.wordpress.com/2012/06/07/grilled-shrimp-with-old-bay/. Marinated for about two hours. Grilled direct at 400 with lid open most of the time. Only took about 6 minutes or so to cook. When they started turning pink/white I flipped. Soaking the skewers helped somewhat but not from completely burning the skewers before they were done.