I cannot find "3M Epoxy Steel" - Please provide a link.
Maybe it is now called "3Mâ„¢ Scotch-Weldâ„¢" or "3M Scotch-Weld 1751 Aluminum Epoxy Adhesive".
Anyone with experience with these products, please post your experience.

PPG bought "Ditzler" in around 1920 and might have had products with the Ditzler name until 1968.
PPG still sells a product called "ALUM-A-LEAD".