Mix orange juice, hoisin sauce, lemon juice and oil in a large measuring cup or bowl.
Add sugar, garlic, and ginger and stir well.
Put chicken wings in a gallon-size resealable plastic bag. Add marinade. Seal bag and coat wings with marinade. Refrigerate overnight or up to 3 days, turning to coat ever so often.
Preheat oven to 400*F. Line a rimmed baking sheet with foil. Remove wings from bag and place on baking sheet. Roast wings until deep golden brown and shiny, 35-45 minutes. Put on serving platter and sprinkle with scallions.