mmmm natural home remedies, i'm not too sure. but if you want to reduce the appearance of a scar, i suggest - bio oil, coco butter, or aloe vera. yes, not exactly something you can make yourself at home, but they're all natural stuff that are gentle on the skin. :)
Olive oil does, its a natural home remedy and easy to use, it moisturises the skin.
Not a home remedy but cocoa butter works
Cocoa butter, or exfoiliating.