How to remove permanent marker from everything

Skin - Use spray deodorant.

Use acetone

Leather, how do I get my 3yo's purple sharpie art off leather?

John Green disproved the first one.

Am I the only one that could smell it right away just from looking at the picture

The diplomats in Geneva needed the white board one....

At the pre-school I worked at, we used Lysol spray. Let it sit for a minute and then most of it wiped away. The other trick I learned there was put a splash of pine-sol in a garbage pail full of water. It gets the smell of baked baby poo out of plastic.