please take care if you clean Headstones before taking photos to use approved product D2 or Orvus paste other products are not made for historic marker or stones that will be outside in all sorts of inclement weather
also do not chalk dust flour or cornmeal stones ... if you can not read them try a different filter on your camera like solarize or black and white ... or try a different time of day or plain water if the temperature is not cold out
also
Portland cement for repairs is EVIL
do NOT use
bad juju

please take care if you clean Headstones before taking photos to use approved product D2 or Orvus paste other products are not made for historic marker or stones that will be outside in all sorts of inclement weather
also do not chalk dust flour or cornmeal stones ... if you can not read them try a different filter on your camera like solarize or black and white ... or try a different time of day or plain water if the temperature is not cold out
also
Portland cement for repairs is EVIL
do NOT use
bad juju