sailsablazin

I had dark mechanical pencil stains on a quilt (I thought that I couldn't see them if I did them lightly--Duh!). I was told to dab them with Lestoil (found at dollar store) and rub with a old toothbrush..It worked pretty well. If you Really look and know that they are there, you can still see some lines. Might be worth a try.
Otherwise, I would say that it was worth the few dollars that I spent.