Good evening, I know its prob. a bit late now to fix what happened but I never wrap my backings. I just spend the time and work the backing be it rawhide, snake skins, fish skins, silk to name a few. I do a sizing coat first and let it dry until almost dry/slightly tacky. I then keep smoothing over it with a wet finger or antler until it starts to set up a little. You can work on another bow or arrows. watch a game whatever tickles your fancy. When it starts to dry and the backing starts to shrink a bit is the danger time when air pockets want to start showing their ugly faces. Just keep working them one limb at a time. I repeat this process until they are stable and glue is about dry and no air pockets are showing. I haven't had a backing bubble on me using this way in a long time.I always use tite bond 3 unless im doing a all natural bow or native replica.