RebelAir
Air-Valve Autobot!
Mdf a roller, white paint of pretty much any breed. I use acrylic house paint, roll it, dry it, roll, it again, dry, sand lightly to smoothness you like and paint,,,When you of course want to do nicer works, paper for practice, nice surfaces for artworks. if you stuff up get the roller out again if you forgot to do 8 boards at a time LOL Cheap to.