I had just asked Coffee&Coach for advice about rehabbing a non-Coach natural leather bag that I picked up at the thrift store and below is the information she gave me about Emu oil, I'm looking forward to trying it out!
"I have a little bottle of 100% emu oil that I get at a local holistic health store that is awesome to use on leather. It's also on
Amazon and a bunch of other sites to buy online. I found a little trial bottle for pretty cheap at:
http://www.highcascadeemus.com/emu_oil/pc/Emule-AEA-Certified-Fully-Refined-Grade-A-Emu-Oil-7p2.htm
There are some name brand products that I like, but I worry that they will darken the leather (which pure emu oil should not).
With the oil, just apply in very thin coats with a natural hair brush or a lint-free cloth. You won't need to rub, just apply and let it absorb. Natural leather sucks stuff up fast (which is why it's such a pain to care for) so you'll see the color darken while it's wet and then lighten as it soaks in. I'm not sure if you're in a cold area, but make sure the leather is warm while you're doing this. This lets the pores open to take on the oil more evenly."