I've used Simple Green on permanant marker before & it usually works for me. But if it's been months, it may be so absorbd that it won't all come out. I used the Simple Green full strength with a rag, using a toothbrush in the harder spots. Most of it came out, I had a few barely visible lines left. This was on white painted walls though, so if you have colors, it mught make the color lighter.
Ditto with what frugalsunnie says; then hide the household markers, crayons, etc and allow only under direct supervision. ;-)
Sorry to say this, but the only way to get rid of the marker marks is to repaint the wall, starting with the use of a good quality primer like Kilz brand.
Oh shoot, I just saw you already tried Totally Awesome, sorry! Guess it doesn't do everything. Sorry don't know how to delete my previous reply. But definitely try Goof Off or the like, that's always my last resort.
I just was turned onto the greatest cleaning product by my sister. It's called Totally Awesome and they sell it at the Dollar Tree. She only bought it herself because it was such a funny name but then was amazed at how well it worked on a wall that she was planning to repaint. When she was done it looked like new.
She bought me a bottle, and my husband had just spilled berry juice all over his tan jacket a few hours before, one dab and it was gone. I'm not going to test it on magic marker myself, but give it a try and let me know. The best thing is, it's only 99 cents!
Otherwise I would usually try Goof Off or one of those stain removers, you can get them at Home Depot. Otherwise a gallon of new paint might have to do.
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