DEPENDS ON THE CONDITIONS OF THE SIGN. IS IT IN A FRAME OR NOT? IF NOT, I WOULD TRY TO FLEX THE SIGN AS MUCH AS I CAN TO SEE HOW MUCH WOULD FALL OFF ON IT'S OWN. ON OCASSION, I HAVE USED A WELL SHARPENED PUTTY KNIFE AND GETTING BEHIND AND UNDER THE CEMENT LAYING ON THE SIGN AND EITHER SCRAPING OR FLICKING PIECES OF THE CEMENT OFF. THERE MIGHT EVEN BE A LIQUID PRODUCT THAT WOULD BREAK DOWN AND LOOSEN CONCRETE....QUESTION IS, WHAT WOULD IT DO TO THE SURFACE OF THE SIGN? DO YOU HAVE A PICTURE OF THE SIGN IN QUESTION?
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GOOD LUCK!!
~DOC
