URGENT ADVICE NEEDED!!!

basically finished an appointment at work yesterday.. put folder on seat (s3 seat black,silver leather) and when i got home noticed a biro had been sticking out and has drawn all over my f****** seat!! right on the silver part...

what the hell will get it off? ive tried warm water, leather cleaner

helpppppppppppp

OK, so i searched everywhere on the net! ferrari forums, porsche forums and detailing forums...

no luck!

so i took a massive risk and used something very risky but it worked..

uPVC Solvent Cleaner...

i really thought it would f*** it up but i had to take the risk.. at first it just faded it and didnt really get it out?? then i got home about twohours later to try and get it out again and it had gone (must have soaked in and lifted it) i was a bit worried it would carry on lifting colour and leave and patch so i cleaned it all and put leather feed and cleaner on and it looks brand new again!

so if anyone has the same sorta problem try it