Join Date: Feb 2010
Location: Whittier, CA. USA
If this is stain grade I would use the same species as your doors & face frames (if it has face frames). You can cover after installation with 1/4" to 3/4" ply & stain & seal to match. If this is paint grade you could still use 1/4" to 3/4" ply & paint to match. I would seal all sides just in case someone likes to use a real wet mop on the floor. You can use the 1X & finish same as ply for your situation. I don't care for luan here but I've seen it used for paint grade kicks.
Just because you can, doesn't always mean you should!