First of all, clean and wash the duck thoroughly and remove any impurity.
Cut off the sharp wing tips, I don't recommend baking them in the oven. First of all, they will dry completely and there will be nothing left to eat. Then, think what the roast duck will look like with these burnt and raised tips as if they were some spikes :)
So, cut them off without mercy and save for a soup, or even keep in the freezer and boil when you make cabbage rolls (they taste good).