I would like to buy Civil War tin flatware and dinnerware and I do not know if they are safe to use for eating. How do I clean them? Some of the flatware looked rusty and figured with a good sandpapering or scrub brush, I probably can get the rust off or a silver cleaner? I dont want to poison anybody or give them something like tetanus for eating off the tin wares. These will not be used for everyday eating but for the civil war reeanctments on weekends. We mostly would go once a weekend a month do to this. So are they safe????????????