MagicWall Magnetic Paint / Primer. Converts any ordinary wood, metal, drywall or masonry, plaster surfaces into a magnetic receptive surface. Paint contains iron particles to attract magnets. Calculate and mark the target area with masking tape Apply 3 coats with brush or roller. Check the strength of magnet holding properly or not. If not then apply more coats to increase holding strength. After 24 hours of paint application you can apply another coat of thin layer emulsion paints, chalkboard paint or thin wall paper.