The radiator in my coupe, a 57 Lincoln Premiere, has developed a leak. It is in the middle of the core. I know the correct way to repair it would be to pull it and take it into a shop for repair. It has already been re-cored in the past. I am really tempted to use one of the stop leak products but I am a bit hesitant. I know all of the claims pro and con. Anyone with any experience out there? Do they actually work or are they simply band aids?