Just iron a piece over lapping the blue part by about a 1/2in. Take your heating gun and stretch and stretch and stretch over the wing tip. Use a glove so you don't get burnt and sometimes you can get help with someone heating while you stretch. If there are still wrinkles after you stretch just heat them out with your heating gun. It might take a few tries but you can do it. Monokote stretches pretty good. Make sure you have plenty of extra monokote to pull on, atleast 2 or 3 inches.