Something similar to what Pete has suggested...
I got a tip somewhere (perhaps here...) that if you rub the oils from your skin into flat paint, it will shine it up to look like leather. Kinda gross, but I tried it and it works pretty good. Just rub your fingers along your nose or forehead and then rub the paint.
I have no idea whether or not this will last very long, but I did try it out on a test piece and it looked pretty good.
Murray