How do I paint over permanent marker?

I let my teenage daughters and their friends sign their names and draw all over their walls with Sharpies..(stupid hey?) I used two coats of primer (expensive kind) then 5 coats of paint. The marker bled right through. I heard putting Laquer over the marker may work. Has anyone tried that?? and if so, what kind?... show more I let my teenage daughters and their friends sign their names and draw all over their walls with Sharpies..(stupid hey?) I used two coats of primer (expensive kind) then 5 coats of paint. The marker bled right through. I heard putting Laquer over the marker may work. Has anyone tried that?? and if so, what kind? Or does anyone have any other suggestions?
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