Covers the procedures for the application of wash primer as a pretreatment for metals such as ferrous metals, stainless steel, zinc coated steel, aluminium and its alloys, cadmium, zinc, lead, tin and magnesium. A description of wash primers is given together with safety precautions and references. A brief history of the development of wash primers is provided in a foreword, which aims at imparting a better understanding of the wash priming problems and process.