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Is there a way you can paint over crayon and chalk on a wall? If not, how can you remove them?
I want to paint my walls, but they are covered in crayon and chalk that has been there for years. The chalk does not seem to come out of the wall easily, and the crayon is so old that you literally have to scrub for 5 minutes for any improvement.
I found this... :)
Toothpaste (regular paste–not gel). This one’s my first pick always (good old regular Crest), it also helps clean up permanent marker stains pretty easily.
Baking Soda – make a paste with water and use it to gently scrub the mark. You could also just sprinkle baking soda on a damp sponge and rub.
Baby Oil – apply directly to crayon stains then rub off.
Mayonnaise – Glob some on the stain and scrub a bit in a circular motion, then wipe off.
Shaving Cream – apply to markings, rub in, then wipe off.
WD-40 – spray some on the marks and rub off. Wash walls with hot soapy water once the crayon has been removed.
Turpentine – dab some on a damp cloth and scrub into stain to remove crayon.
Lighter Fluid – apply as you would turpentine
http://tipnut.com/21-crayon-busters-how-to-remove-crayon-from-walls/
since you are going to repaint anyway, I guess I would sand the crayon and chalk off of the wall.