I had occasion to install some crown molding recently. First I've done in quite a while. Stained hemlock solid wood, not MDF. I found that when coping the inside corners, it was difficult to get the coping saw at a sharp enough angle to remove enough wood, so I was resorting to various files and rasps with slow but eventual success.
Is there a power tool that efficiently removes excess material from the back of molding with speed and control? I was wondering if a Dremel with some round rasp drum would be good (and does such a drum exist?) or perhaps someone has a tool or method they are happy with?