We were lifting the body off of the chassis for paint and the body cracked near the bottom rear corner of the drivers door. The crack is about 6” long and is completely through the fiberglass. I’ve read the suggestion from papa to use a vinylester resin which I have ordered. Any other suggestions on how to repair the crack. My main concern is since this location has a lot of stress on it when flexing the body for installation or removal will the repair withstand the flexing? Rest assured that my over exuberant helper has been flogged unmercifully.