Rust-Oleum Chalkboard Paint is a tough, scratch resistant finish that allows you to create a writeable / wipeable chalkboard surface on a wide range of substrates. Apply to walls, metal, wood, plastic, hardboard and more. Application - Stir well before use. Use only when temperature is between 10-32oC and humidity is below 85% to ensure proper drying. Previously painted surfaces should be lightly abraded to provide a key. Bare metal and wood should be suitably primed prior to painting. Apply paint with a soft brush using light even strokes taking care to avoid unsightly runs. Coverage - 10-122m/L. Two coats recommended. Drying Time - Dries to touch in 30-60 minutes. Allow at least 2 hours between coats.