I'm happy to share with you some very good results. My hubby and son spent many hours redoing our dining room table. The top never had much of a finish, so they sanded it and put many coats of polyurethane on it. They've become extremely protective of this renewed table. It's oak and well worth preserving.
Well, today I spent making new pattern pieces from a very ancient pattern. I traced the pieces with a pencil and than had the brilliant idea to outline the patterns with black permanent marker pen. That way, I thought, I could scan them and copy them for back-up pieces. Great, huh?
It never occurred to me the ink would bleed through the paper and permanently marked my gorgeous table, which it did.
I vaguely remembered something on the Web about removing permanent ink. I did the Google thing and yes, there were many choices. I happened to have some baking soda toothpaste but any toothpaste will do, and baking soda. Made a paste of both and using a plastic-no-damage-scrubber, the marks slowly disappear. Some were very dark. They're GONE!! Goody for me--I'm not in trouble.
Other suggestions were WD-40 but the toothpaste-baking soda idea seemed right.
So, if you're off doing crazy stuff like I did, you know you can Google for help. Or, just ask me!