I was very excited to read the above info, as I have blue biro on my soft brown leather sofa.
I bought Panthene Pro V hairspray and went for it.
Unfortunately not only did it remove a small amount of the biro mark, but also the colour of the leather where it had been sprayed.
I now have a dark brown leather sofa with pale brown patches.
DON'T USE HAIRSPRAY - UNLESS YOU HAVE A CREAM SUITE.
I bought Panthene Pro V hairspray and went for it.
Unfortunately not only did it remove a small amount of the biro mark, but also the colour of the leather where it had been sprayed.
I now have a dark brown leather sofa with pale brown patches.
DON'T USE HAIRSPRAY - UNLESS YOU HAVE A CREAM SUITE.