Rust Bullet coatings can be applied by brush, roller, or spray equipment. An airless spray system using a 517 or a 523 tip at 3000-5000 PSI pressure is the suggested method for marine, industrial, or other commercial applications. A minimum dry film thickness (DFT) of 12 mils is recommended. It is recommended that before and after each coat of Rust Bullet is applied, the pump, lines, and sprayer be flushed with Rust Bullet Solvent. It is essential to keep the application equipment clean and the line free of any buildup of Rust Bullet product.