Hold a bag of ice against the mark until it becomes cold and then scrape the mark off.
If finished properly chalkboard paint would work just as a regular chalkboard would. Depending on the wall type you may need to sand the paint after every layer dries to create a smooth chalkboard-like surface on a wall.
Souhaitez-vous un crayon
Chalkboards were made of slate in the olden days because slate could be split into flat, thin pieces, and because you could use chalk on it. The chalk was easy to remove, as well. So slate was the perfect choice for chalk boards. But it could not be made into large sheets of slate. For a long, long time, chalkboards have been made with black paint, real slate, and so on. Modern chalkboards are made of a mixture of porcelain enamel with silica granules. Larger silica particles are called, "Sand". But the small silica granules in the porcelain enamel give the finished chalkboard just enough roughness that the chalk will rub off on it. Porcelain enamel would not accept chalk lines by itself. (Try using chalk on a glass or china dinner plate) The enamel-silica mixture is applied to usually 22-guage steel for durability, a pressboard backing is added, the coated steel/backing gets a frame around it, and there you have a finished chalkboard.
Drawing with crayons is not etching. You do not dig into anything with crayons. To create a crayon etching, you would need to use the crayon to indent something.
Another way to say that would be a fresh start: renaissance, rebirth, regeneration
I think that you can find chalkboard paint in many different places. Kidwall paint company supply chalkboard paint in different colours as do Hudson paint, so I would try to see if you can find a local supplier either of these two paints. I would look at your local Home Depot store as they are likely to stock chalkboard paint too.
crayon
feet
You would say "J'ai ton crayon" in French to mean "I have your pencil."
Originally, chalkboards were made of slate stone and were not magnetic. Some modern chalkboards today are magnetic. Also growing in popularity is the whiteboard, some of which are also magnetic.
A crayon is made of wax. So no.
chalk would come first