door handle/mirror reinforcement plates

Its pretty common to see the metal puckered under the mirror base so it is a good idea to reinforce it. I plane on making my own for the car im currently working on. Also have seen a few A bodys crack where the door handle mounts on the small end. I had a crack on my swinger door.
Im thinking about sandwiching the reinforcement with some body panel adhesive. Snug and let it set up.