After the war, with the help of his ex-serviceman's grant, Weinberger trained under Ceri Richards at Chelsea School of Art, where his Expressionist style and use of colour was out of kilter with the prevalent Euston Road style. Although he completed his training at Goldsmiths, he benefitted most from the private painting lessons he took under Martin Bloch, who helped him develop his signature style and rich palette. Weinberger's friend, the writer Iris Murdoch described him as 'a great painter whose genius is not well enough known. His works relate us to the deep emotions and profound joys of the early periods of the century when painting was a great universal exploration: impressionism, post-impressionism, fauvism, symbolism, expressionism, when painters adored paint and worshipped colour, inspired by passion and controlled imagination and courageous faith in their art'.