I went to Hobby Lobby this past weekend to pick up some stuff for HSKS 8 and found unpainted doors. They were called Fairy Doors, but this one looks for like a castle. I had to have it + it was 40% off.
I am pretty pleased with the outcome. I have about 3 layers of paint on the door + glossy gel medium. The hinges have about 4-5 layers and glossy gel medium. Adding the medium to the hinges really made them have a real quality.
I called it the Department of Mysteries, but I have had people say door to Fluffy on the 3rd floor and door to Room of Requirments. It is left to be pondered for others.