Created from multiple industry sources: ASTM D610-08(2012) Standard Practice for Evaluating Degree of Rusting on Painted Steel Surfaces, ASTM D5065-13 Standard Guide for Assessing the Condition of Aged Coatings on Steel Surfaces, “Fitz’s Atlas of Coating Defects” by Brendan Fitzsimons, “Guidebook: Facility Condition Assessment” Federal Transit Administration, SSPC-TU 3 Overcoating Existing Coating Systems Applied to Steel Substrates, SSPC-VIS 2 Standard Method of Evaluating Degree of Rusting on Painted Steel Surfaces