Rust-Oleum Chalkboard quart brush on.
Rust-Oleum Specialty Chalkboard brush on is an ultra-hard scratch resistant finish that converts hard surfaces into a custom creative and easily erasable chalkboard for unlimited messages. Ideal for creating a chalkboard on interior surfaces including metal wood masonry drywall plaster glass concrete unglazed ceramics and hardboard.
Oil based formula provides a smooth even spray for easy application and works great for small craft projects. Covers up to 12 sq ft dries to the touch in 20 minutes allow to cure for 3 days before writing on surface.
Flat finish provides a smooth coat that accepts chalk with ease.