Blu Tack as an eraser
by Jim Durkin
(Doraville, GA. USA)
Took a drawing course this past Spring and was given a sample of Blutack to use in place of a kneaded eraser. It seems to be better at lifting graphite and charcoal off paper with no damage.
If you decide to give this a trial keep it away from your kneaded eraser which it will eat.
I ordered some from blutack.com. It was not cheap, but I find it very effective and long lasting even in very small pieces.