Restoring Vintage Victorian Era Greeting Cards

I have recently began a small restoration project that involves digitally enhancing vintage greeting cards from the early 1900's. I am choosing my favorites from a huge collection of cards and touching them up a bit. I am trying to keep them as original as possible, usually leaving small blemishes and other signs of age. I think the aging and muted colors adds character to some of these cards. This is a very fun and exciting project for me as I love the style of the artwork from this era.