Extreme Reality photographs how things actually age - corrosion, flaking coatings, abandoned machinery and objects nature has taken back. For a modeller it works as reference rather than instruction: instead of numbered steps you get images of genuine surfaces to work from when weathering. Individual volumes of the series are listed separately.
The practical benefit is a reality check. Most overweathered models happen because the builder worked from an idea rather than a reference, and real rust is usually subtler and more logically placed than we expect. The products for the job sit in weathering, settings for a derelict scene in diorama buildings and scenery, and the step-by-step methods in modelling technique books.