GaryL... what is so wrong with you tank that it cannot be saved? You can chemically clean and then seal the interior. you can bead blast, clean and then spray the outside with galvanie paint.. you can replace the sending unit, filter sock, etc... so why can't you 'make it look good' again?
Gary / 69Z28-RS .. (whose original tank now has a 'drain' - where I replaced a 'hole' with a screw in seal')..
.. and actually, I didn't have to beadblast mine; I just used fine abrasive to clean the outside, then clear coated it...