We have a rather large mirror over our fireplace, 4.5 ft. by 6.5 ft. Although not in fashion, it works for us. We have tile that is white with taupe threads running through it around the firplace which will stay. Can we easily enhance the mirror with column moulding? Can the moulding lay over the mirror? The current 2.5 in. moulding is butted up against it. There is a window on one side which would not accommodate large butted moulding.