Used to make a magnet stick to the wall or sign surface. Can be painted over with standard wall paint to make it look like a standard painted wall. Paint has metal in it to make the magnet stick.
Many retail brand companies that change out their retail graphics often use FerroWall paint on their retail store walls. Once you have painted the wall or signage area a magnet sheet will stick to it. You can also paint over the magnetic paint with any standard wall paint to make it look like any other standard, painted wall.
If you have the entire wall surface painted with FerroWall paint you can then place magnetic graphics anywhere on the wall. Or you can take them all down and just have a normal painted wall. This allows you to move the graphics or re-arrange the decor or graphics.