I cannot find a code in NFPA 72 or NFPA 1 that says a smoke detector cannot be painted. The manufacture installation sheet also does not say do not paint. The only place it says do not paint is on the detector itself. The detector was tested and passed the smoke test. Should this be a failed detector if device says not to paint? I have no literature to back up why we failed the device, this is the problem. Maybe you guys can help me out with what seems to be a simple question.