POR-15 Prep and Ready (or Metal Ready) has been renamed to POR 15 Metal Prep. It is the ultimate in the relentless fight against rust. It not only dissolves away the rust it also etch primes the clean surface and leaves a Zinc Phosphate coating to prevent further rusting. This amazing liquid is non-toxic, non-flammable and non-corrosive. It ensures perfect paint adhesion and gives better welding conductivity. It can be brushed on, sprayed on or just immerse rusted parts to bring them up like new. Surfaces should be pre-treated with POR15 Cleaner and Degreaser (Marine Clean) for greater effectiveness. 2 Sizes Available: - This is US Quart (946ml) - Also available in US Gallon (3.78 litres) . Related Technical Articles: - How Do I Use POR 15 Rust Preventive Paint? - How Do I Stop Rust Permanently with POR-15 Solutions? - How Do I Clean my Engine? - How Do I Seal a Fuel Tank?