I happen to put a close to 6 inch long pen mark on the backseat of my 08 lariat and am having not luck being able to get it off. I have tried gasoline, shoe shine, hairspray, rubbing alcohol, and dish wash. If anyone has any info on what i could use to get this off please share. Thank you.

 

Tuff Stuff works pretty well on plastic and leather, give it a try. You might have to do it a few times to get it all out, though. don't get it on light colored cloth if possible, though. i've seen it darken cloth when i used too much.