Tinning settled in Montreal where he established his studio. In 1949, he travelled and painted in Newfoundland for two months. He exhibited these watercolours at the
Montreal Museum of Fine Arts and published an article on his experiences in Canada's newest province. In the 1950s and 1960s, Tinning completed graphic designs for the
Montreal Museum of Fine Arts and the
Ritz Carlton Hotel in
Montreal. Sketches for this mural are preserved at the Lachine Museum in Lachine, Quebec. In 1960, the Ritz Carlton Hotel in Montreal commissioned Tinning to design the Maritime Bar. The hotel, renovated and reopened in 2012, still owns about 60 of his works. In 1953, he was elected an Associate Member of the
Royal Canadian Academy of Arts and he became a Full Member in 1970. Although Montreal remained his home and was his constant inspiration, Tinning also enjoyed rural Quebec – especially the Eastern Townships around
Lake Memphramagog. He frequently visited family in the
Okanagan and painted in this region of
British Columbia. In the 1970s, Tinning experimented with abstract compositions. He painted floral still life throughout his career and it was his most popular genre. Tinning had solo exhibits at many galleries across Canada including the
Vancouver Art Gallery in 1942 and Walter Klinkhoff Gallery, Montreal, Quebec in 1963. During the 1980s and 1990s, his war art paintings were included a numerous group exhibitions such as
Canadian Artists of the Second World War at the
Robert McLaughlin Gallery in Oshawa, 1981,
The Sweetest Spring at the
Canadian War Museum in Ottawa, 1989, and
Victory Parade: Canadian War Artists in Holland 1944-45 at the
Legermuseum in Delft, Netherlands, 1991. In 1994, Tinning held his last solo exhibition at the Dominion Gallery, Montreal, two years before his death. His works are in many public collections, including the
National Gallery of Canada, the Montreal Museum of Fine Arts, and the Canadian War Museum. Tinning died in Montreal on February 28, 1996. ==Posthumously==