On 11–13 September 2018, Asst. Prof. Dr. Warakorn Limbut and the team from TAB-CoE, Faculty of Science, Prince of Songkla University, had been invited to give a special talk in the topic of “Electroetching Device for restoration of erased serial number on metal surface” in the campaign of knowledge management and technology and innovation contribution 2018 “The management of research knowledge for security applications”. The team had visited few places; these are Office of Police Forensic 3, Office of Police Forensic 4 and Office of Police Forensic 8.