I have just framed a 42" x 52" painting that now weighs about 50 lbs. It will be hung over a mantle. Problem is, instead of hanging flush against the wall it must hang on top of a 3/4' decorative moulding (don't ask!). As a result, the hooks will be 3/4" away from the wall. Can I put a wire on it, or is there a better solution?