Powder coating has become one of the most widely used surface finishing technologies across industrial, commercial, and consumer applications. Among the many powder coating chemistries available, epoxy powder coating and polyester powder coating remain the two most dominant categories. Both offer distinct performance characteristics, application advantages, and cost profiles, making the choice between them a critical decision for manufacturers, engineers, and procurement teams. This article provides a comprehensive comparison of epoxy and polyester powder coatings, focusing on their chemistry, mechanical properties, environmental performance, cost impli