Wehrmann’s work includes oil paintings, watercolours, drawings and prints. After attending the School of Applied Arts, he first created drawings, etchings with some woodcuts and linocuts.

His preferred motifs were the port of Hamburg, the Schleswig-Holstein country and the stunning landscape of Algonquin Park and surronding area.

Oil painting became more important, certainly due to painter Albert Johannsen’s influence and his training with Arthur Illies.

At first, earthy, dark colors dominate his painting. Later, more colorful, yet very varied, often with a strongly impasto application.