I'm not sure how risky it is to use galvanized cans, but there is a lot of discussion around it because of truck and tractor manufacturers now warning against it. When I read about this awhile back, there were calls made to the can companies. I remember some being told by the can manufacturer that if the tractor/truck owners manual said not to store fuel in galvanized cans, then they recommended not using their galvanized cans. After reading above and wondering if the cans are coated on the inside I called Justrite. They said their cans are galvanized on the inside and powder coated on the outside. I asked if the galvanized inside also had a protective coating for fuel, and they said no, just galvanized. Makes you wonder if the warnings are based on the wide variety of galvanized cans that could be used, so they warn against all to be safe.