Hi Elly -

It sounds crazy, but hair spray can remove all sorts of permanent magic marker, ball point and other print stains - from clothes, and from formica counters, etc - I've never used it for something like leather, but you could give it a try - it make take several spritzes before it finally fades out.

Once the stain has been faded out, then I take soapy warm water and clean the hair spray residual off whatever I'm working on.

Try it - sounds like you've tried everything else.

Love - your friend - June