Mix the Sweet Chilli Sauce, ketchup, soy sauce and lemon juice together in a small bowl.
Put the wing in a plastic container and pour the sauce over them. Put the lid (or plastic wrap) over the container and shake well to completely cover the wings.
Put in the fridge and let marinate all day or over night.
Heat the grill to medium.
I put my wings on skewers with some large pieces of red bell peppers but you can also just place them on the grill individually. Cook, turning often, until cooked through (about 20 minutes). Be sure to keep an eye on them and do turn them often as the sweet cause will cause them to burn easily.
Serve with greek yogurt or your favourite wing dipping sauce.