what will hold this plastic together from behind? The cracks are along the curved piece that folds over the metal seam that you see when you open the door. I need something thin and strong that will be strong enough to hold it together from behind without peeling off. I can use some sort of fabric glued to the inside of the plastic channel but the glue needs to really stick to plastic and not peel off.
I have all the chalky stuff ground off the panel and will be recoating it with SEM re-surfacing product and then SEM plastic paint / dye. But before I do that I need to make sure these pieces are bonded together from behind so they won't pull apart on the car.