A cutomer of ours is asking us to print some decals that he can apply to his football teams helmets. The decals only need to last 1 season (90 days) as they will send the helmets off to be refurbished once the season is over. We will be printing/cutting 1 image for each side of the helmet, a strip down the center and the players number. Seeing as these would be mounted to complex curves, what kind of material would you recomend? I would imagine that these would be very difficult to mount if you did not have any experience. Is there a material out there that the end customer could install himself? Thank you for any feed back.