Paint is done and one wall of wainscoting is up! I will have to finish the trim around the windows and doors before I go much further.
The wainscoting was cut to 40" and then painted, but the floor/baseboards are not exactly level so most of them have to be cut (hence the unevenness, which will be covered by the chair rail). I used a laser level to get my chair rail height. You can see it sitting precariously on the cardboard box.