Magnetic blackboard paint?

[imamartian]

Is there such a thing? or will i find it on the same shelf as the striped or tartan paint

And if there is such a thing, is it waterproof, i mean can it be used on a board (marine ply?) and live on an outside wall?

Thanks

 

[JohnD]

blackboard paint exists.

magnetic boards are going to be steel or plastic that's full of iron particles.