I’ve got aluminum boats so I wouldn’t know for sure but I don’t think aesthetics will be your issue. It would be easier to paint your ceiling if it was laying on the ground is kind of what I’m saying haha. When you apply liquid resin to something above you, gravity will want to pull it down. But it appears a few people that posted above fixed theirs from below so I would assume it’s possible. The absolute proper way to fix would be by flipping it over but I sure don’t have that capability. You could also hire the work done, there are some extremely skilled glass guys in my area