Cut the tips of the wings and if doing so rinse the chicken. Dry the chicken with paper towels and add the wings to a bowl or container. Season the chicken with the salt, black pepper, paprika, onion powder, garlic powder and parsley. Mix the seasoning into the chicken then set aside.
To a small bowl, add and combine the sweet chilli sauce, ketchup, sriracha, soy sauce and sunflower oil then pour it onto the seasoned chicken. Mix the marinade into the chicken then cover the bowl and refrigerate for around 1 hour. Up to 6 hours would be ideal if you have the time.
When you’re ready to bake the chicken, preheat the oven to gas mark 7/425oF/220oC/200oC fan and remove the wings from the fridge. Place a rack over a baking tray or you can use a grilling pan. Place the wings on the rack with the outside of the wings facing down and the inside of the wing facing up. Leave the excess marinade in the bowl.
Bake in the lower part of the oven for 30 minutes then remove the tray from the oven and flip the wings over. Use a brush or spoon to spread the rest of the marinade on top of the chicken then place the wings back in the oven on the top shelf. Bake for another 20 minutes or until wings are cooked through with a slightly crisp edge. Remove from the oven and allow to sit for 15 minutes before serving. Optionally you can garnish with fresh parsley before serving.