Lifetime prediction often relies on various accelerated methods with the end goal of accurately predicting time-to-failure and failure modes which may occur during real-world exposure. This presentation will focus on a case study for organic coatings over a coil-type metal substrate. Samples from 2011 were evaluated by multiple corrosion, humidity, flexibility, and adhesion measurements prior to field exposure at two test fences in Florida. An unexpected field failure, general blistering, was observed relatively rapidly after the field exposure commenced. This study focuses on data analysis of the 2011 physical and corrosion tests, field exposure results, and recent electrochemical and microscopic evaluations of unexposed 2011 retain samples. The retain samples were from the same 2011 study, but they were never tested and were maintained wrapped on a shelf in a laboratory. No correlation was observed between the standard 2011 tests and the resulting field performance. However, newer test methods, including Electrochemical Impedance Spectroscopy (EIS) and Scanning Transmission Electron Microscopy (STEM) cross-section analysis with elemental mapping, provided insight into the reason for the field blister failure. The proposed mechanism of failure was inconsistencies in pretreatment deposition which caused inconsistent EIS performance and localized blistering upon field testing.