I've found that on planes that have flat surfaces with Monokote on them that the Monokote seems to lift and get air bubbles as the plane ages. I have a Brodak 38 Special that is about a year old and the Monokote is getting loose on the large flat surfaces like the horizontal stab, elevator and the back half of the fuselage. I find that I can iron it back down and poke pin holes to release the air bubbles and then I take a moist cloth and go over the hot surface to press it down. I used the Metallic Red, Monokote brand. I'm wondering if using Balsarite or something else will make the Monokote stick longer. I think that I've read that elsewhere. My edges have all stayed on tight, it just seems to be the center areas that lift. Maybe I should be stretching the film on the flat surfaes when I apply it like when I do the wings.