Photographing work on a cloudy day

Direct sun lies about glaze, glass, and anything with a sheen. Clouds tell the truth. Put the work near a window, not in it. Turn off the overhead if it is warmer than the daylight. Take more pictures than you think, then pick the one where the object still looks like itself. A phone is enough if you hold still. A sheet of white paper is a reflector. A dirty lens is the actual problem. Crop after. The photograph is evidence, not a poster, until you decide it is both.