Deriving from many modernist sources, Arch’s early paintings showed cubist, abstract and finally texture painting influences. One of his best known works is a large mural for the Commonwealth Bank in Ballarat. He received several other ceiling commissions (mural) in Ballarat.
He held about 30 solo exhibitions between 1961 – 2000 in Melbourne, Geelong, Adelaide and Sydney. These included six with Barry Stern in Sydney and three with Eastgate & Holst (1992, 1996 and 2000) in Melbourne. He also participated in numerous group exhibitions including an exhibition at Geelong Regional Gallery highlighting four Geelong artists in 1987 and again in 1991 for the Scotchmans Hill Prize.