I was in HW and lost a costume comp in my iron man costume to a duct tape transformer that didnt even transform lol. It looked really good from far but up close was a mess. These costumes look great though.
actually on this thread you may notice that its not just the cowl where i used duct tape, its also what held most of the armor together and also what i used to wrap around old rain boots i cut up so it will have a form fitted appearance, duct tape also played a major role on my bumblebee costume hehe