Combine all of the ingredients in the dry rub and sprinkle over the meat.
Place ribs in the grill/smoker over indirect heat at 250 degrees F. Smoke for 45 minutes. Begin to spray with sherry after 45 minutes, spraying every 15 minutes. Smoke for an additional 2 1/2 hours.
Place ribs in a foil pan, add apple juice, and cover with foil. Place back in the smoker and cook for 2 more hours.
Remove foil and glaze ribs with guava BBQ sauce, then cook for 30 more minutes uncovered.
Guava BBQ sauce
40 oz guava paste, large diced
1 2/3 cup cider vinegar
1 1/4 cup dark rum
7 1/2 oz tomato paste
7 1/2 oz lime juice
2 1/2 oz soy sauce
2 1/2 oz worcestershire sauce
3 1/2 oz ginger, finely minced
5 green onions, white part only
5 garlic cloves, finely minced
1 1/4 cup water
Method
In a sauce pan, combine all ingredients and bring to a boil. Simmer over low heat until reduced.