Has anyone ever come across corrugated metal roofing that's not coated or galvanized?? Its called Corten steel and used on roofs and decorative siding to get the patina rusted look. We used it on our last house for roofing but had to get from Great Falls from Bridger Steel.
Anyone ever seen a Canadian manufacturer that does this??
Try DF Boiler Tube Industries in Edmonton, if Danny can't get it for you nobody can. CW Carry or Metal Fab in Edmonton may also be able to help you out.