Guirado returned to Spain from Australia in 1973 and developed his new-found style of painting in the 70s experimenting with abstract surrealism and essentialism as well as continuing classical portraiture, but this time his backgrounds were created using his new signature technique with the portrait either drawn or painted on top. His paintings were dark and reflective of the era with Guirado commentating on the Catholic Church, his spiritual beliefs, and his newfound interest in the Veda. He mentioned in an interview that when he painted in blue or yellow it was positive and when he painted in browns it was negative. Guirado also started to comment on pollution and environmental concerns in the 1970s, long before it became a concern to the general masses. In 1976 the head curator from the Museum of Modern Art, Carlos Arean, added a work by Guirado to the permanent collection noting 'Guirado was an artist with his eye on the future'. The museum became Museo Reina Sofia, Madrid, and is home to Spain's modern and contemporary masters including Picasso's masterpiece Guernica.