Has anyone tried Henry's Wet Patch Roofing Tar on the inside of the doors??? Just a thought....
That's an old time fix. The body shops used to throw a glob of sticky stuff on the inside of the door panel to keep them from drumming going down the road. Anything that changes the response to vibrations will do the trick for that.
I'm happy with the stuff OEM's use. A 3M product.
Can't go wrong with 3M products.
