This door (pictured below) used to work just fine, but my superstitious mother, may she rest in peace, painted over it to prevent it from closing. Now it is sealed open. Since it is the door to the bathroom and I intend to rent out the house, I would like to get it in working order again. Is there a way to repair this? Do I need to replace the entire door?
Note that this procedure has also been applied to several other doors in the house, so I will be looking to implement a solution multiple times over.