Larry: I thought some of the others would have jumped in and answered your question. Since they didn't, I guess I'll tell you what I know is used. A mixture of 3 parts water and 1 part ammonia. Then a plastic bristled brush. No wire, etc... plastic only. Maybe others can expand on this a little, but I hope this helps. Kyle > Hi List: > > What are the methods y'all use for cleaning stones in order to read > inscriptions. What type of permissions does one have to get to clean ancestors > stones but stones which are located on plots that I do not have direct ownership > of. > > The cemetery I want to do this work on is in NW Illinois--the major > impediment is hard encrusted lichen and the stones are 1850-11890 era--the stones > themselves are in good shape. > > Larry Leahy > Muncie >