The main objective of the Action has been to achieve a better preservation and conservation of cultural heritage by increasing the knowledge of museum objects through non-destructive analysis and testing and by improving the synergy between art historians, archaeologists, conservators and natural scientists. The Action strengthened the multidisciplinary community in this field. It enhanced the capability for answering questions related to museum objects and the exchange of knowledge. Action G8 provided museums and similar institutes easy access to universities and research facilities that have the required analytical techniques and related expertise available. Moreover COST Action G8 led to several new developments like instrumentation and methods for parallel in-situ electrochemical and X-ray studies of corrosion and cleaning/passivation of metals, ultra low energy SIMS for the study of the early stages of corrosion on glass and metal surfaces, differential PIXE measurements of thin metal and many other.