Posted By:
jay behrensI knew some smart ass would come up with something else 
and I am sure there more that would fall into this catagory.
I'd say erasing pencil marks falls under the the tape, glue catagory of removing something that was not originally supposed to be there. I know that with a really good eraser, depending on how dark the lead and if the writing left an indentation, i have been able to remove some pencil marks without leaving a trace that it was ever marked.
Jay