CRAZY ELF 32" x 80" Six Panel Real Primed Door Slab, DIY Panel Door, Modern Interior Barn Door, W93642076What is a real primer door panel The primer door panel has been coated with three layers of white paint. The door core material has undergone anti corrosion treatment. The first layer of primer is for a smooth surface, the second layer of primer is waterproof, and the third layer of primer is aesthetically pleasing. Each layer of paint is polished and inspected by craftsmen, which is why true primer door panels are different from PVC or pine doors.