Check the listing for details. POR-15 Metal Prep; Metal Etching Rust Neutralizer; 1 Quart. Condition: New. Listed at 22.99 USD. Enhance the adhesion of any opaque paint or coating with POR-15 Metal Prep. Specially formulated for use on various bare or moderately rusted metal surfaces this powerful pre-paint solution gently etches metal to create an ideal anchor pattern ensuring the best bond for rust-preventive coatings primers or topcoats. Metal prep also works on aluminum and polished metals for opaque paint application.Key Benefits of POR-15 Metal Prep:Optimal Paint Adhesion: Etches metal and leaves a zinc phosphate coating for maximum adhesion ensuring a strong chemical and mechanical bond between paint and metal surfaces.Rust Neutralization: Effectively neutralizes rust on steel surfaces preparing the surface for POR-15 Rust Preventive Coating or other high-quality coatings.