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I am trying to attach a large steel handle to the aluminum frame of a sliding glass door – see picture. As you can see in the drawing, the handle will mount to the door frame at two 4″x 4″ plates. I am looking for a permanent installation. Both the handle and door would be powder coated. Should we rough up the finish or sand it off for better adhesion? I am guessing that it takes less than 8 pounds of pressure to slide the door open and closed. Is there a 3M tape that would permanently bond this handle to the door?

Thanks.