The CARE of rock art, still in its infancy, but a toolkit is being designed for experts and non-experts, so one to keep an eye on. 3500 rock art panels are quoted, and apparently in the last 50 years has seen some deterioration due to climate change...http://research.ncl.ac.uk/heritagescience/

http://research.ncl.ac.uk/media/sites/researchwebsites/scienceandheritage/CARE%20Project%20Fact%20Sheet%20V%207.pdf