I am sorry this will show up on several lists , but I am hoping someone can help me !! Recently I received @ 20 Tin Type pictures , most are in very bad shape, some have a rust on them, others are starting to turn black & some are starting to flake. Is there ANY way to stop the aging process & remove the rust & damage that has already started. Thank you for any help you can give !!!! Martha Jo Marcum Carr