I have received two different sights , both saying pretty much the same thing thank you Nelda and Delbert the only safe way is to use reflected sun light. (USE A MIRROR) Never apply anything to a stone. Sometimes a video shows the writing better then a normal camera. Cemetery Conservation and Tombstone Care http://www.progenealogists.com/tombstonecare.htm Good article on why not to use shaving cream (or really any other substance) http://www.savinggraves.org/education/bookshelf/shavingcream.htm