Bought a few boxes of shotgun shells a couple months back and threw them in the trunk and then forgot they were there. Sometime between then and now, a bottle of water I keep in the trunk for the dog busted and spilled on the shells. Almost all of them now have rust on the brass, but nothing severe. Most of the shells have one or two small specks on the sides and I'm sure are fine. A few others have either more moderate amounts of rust and/or rust right around the primer. Are these shells still safe to shoot? If it were rifle and handgun ammo I would say definitely not, but thinking they might be ok for shotgun shells. Can I use some 000 steel wool to remove the rust and still safely use?