JMBT, I should have mentioned this earlier in your post, if you haven’t already opened the access panels on the doors you probably should do so and at least inspect, if not remove the sound deadener that is probably now lay in the bottom of the doors instead of attached to the exterior. I also recommend using rattle can to hose down the inside of the doors afterwards. And don’t neglect inspections of the quarter panels from the trunk, they put deadener in there , too, including above the wheel well. The old deadener acts like a sponge and holds moisture. I need quarter panel repair and another door for the ‘52 Special I have due to the aforementioned deadener.