Rinse the wings under cold running water, then drain and blot dry with paper towels. Make two or three deep slashes, to the bone, in the meaty part of each wing. Place the wings in a large nonreactive bowl and stir in the 1/4 cup of peanut oil, 1⁄4 cup of lemon juice, 1/4 cup of Worcestershire sauce, 1⁄4 cup of beer, the salt, and the 1 teaspoon of pepper.
Heat the 2 tablespoons of peanut oil in a medium-size heavy saucepan over medium heat. Add the onion, garlic, ginger, and hot pepper flakes and cook, stirring with a wooden spoon, until the onion and garlic are lightly browned, about 5 minutes. Stir in the ketchup, 1⁄3 cup of beer, 2 tablespoons of lemon juice, 2 tablespoons of Worcestershire sauce, 2 tablespoons of vinegar, brown sugar, honey, soy sauce, mustard, and 1⁄2 teaspoon of pepper and bring to a boil. Reduce the heat to low and let the sauce simmer gently until thick and richly flavored, 10 to 15 minutes, stirring occasionally. Remove the barbecue sauce from the heat. Measure about 1 cup and set this aside for serving.
Preheat to medium-high
Brush and oil the grill grate. Drain the wings and arrange them on the hot grate, pulling them open to expose as much skin as possible to the flames. Grill the wings, turning them several times with tongs, until the thicker wing sections are no longer pink near the bone, 12 to 16 minutes in all. Reduce the heat if the wings start to burn. Start brushing the wings with the barbecue sauce during the last 5 minutes of cooking.
Transfer the wings to a serving platter. Brush them again with the sauce, and serve with the reserved sauce.