Šajn presented himself as a painter already in 1955 in the Theatre of Koper and then in the Gallery of the Koper Museum, followed by individual exhibitions in Ilirska Bistrica, Postojna, Trieste, Sežana, Ljubljana, Opatija, Rijeka, Nova Gorica, Izola, Pivka, Kanal ob Soči, Cerknica, Treviso, Lipica, Kranjska Gora, Idrija and many other places. The author presented himself in a large and echoing retrospecitve exhibition in Ilirska Bistrica at six exhibition places at his seventieth anniversary. The monography was published on the occasion. He has had more than 90 individual exhibitions to date. His works are found in private collections throughout the world.

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"A quick look into the opuses of self-thought painters, not to mention the most renowned modern ones, shows that they had success mostly because they knew how to oppose traditional schools of painting and establish their own »academy«, tailored to their purposes."

Ivan Sedej