The 28th Cold Spray Club meeting was held in Trinity College Dublin on April 28, 2023, and was organized by MINES Paris with the assistance of Prof. Rocco Lupoi, Shuo Yin, and STAM researchers. Over 70 academics and cold spray experts from 12 countries and four continents attended the meeting, which was a huge success. The meeting included 16 keynote presentations, social events, and a brief history of Trinity College Dublin’s Physics department. We were also very pleased to welcome the Dean of Research, Prof. Sinead Ryan, and Prof. James Lunney at the event as invited guests. Prof. Lunney performed a live experiment to demonstrate the principles of conical diffraction.