Have used POR-15 a few times. Works great when done properly. Definitely use the prep product. Lot of guys make mistake only using the paint.
Quote:
POR-15® Metal Prep provides the best adhesion for POR-15® Rust Preventive Coating on any metal surface, including aluminum and shiny polished metal surfaces. Our simple process gently etches metal, creating an ideal anchor pattern for coatings such as POR-15® Rust Preventive Coating, while simultaneously leaving a zinc phosphate coating to insure chemical bonding of paint and steel.
http://www.por15.com/POR-15-Metal-Prep_p_15.html
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