I build large aluminum world globes …
Well, that’s certainly an understatement.
Welcome to the boards Matt.
Marine grade contact adhesive sounds good. A thermal adhesive film [u]3M-ThermoBond[/u] might be another option. [u]Photographic “dry mount” adhesive[/u] sheet stock (applied with a hot iron) would work as long as it isn’t an exterior application.
But controlling the perimeter of the piece, so that it does not unravel, might be more of an issue.
BTW: Did I see your work in the Wall Street Journal recently?