From what I seen on H-Easy they do not appear to be painted or decals. They probably will be printed in black resin like most of the Bunker Studio offerings. Detail will probably be excellent in 1/350 scale.

3D printed planes is the route for me these days. Shapeways with their new printing process saves a great deal of time. Just paint, add a propeller and decal.

Would really like somebody to start printing 1/700 propellers.