The Extreme Duty CLP, from Lucas Oil Products Inc., is a lightweight, do-all gun oil designed to penetrate rust, free stuck parts, and dissolve fouling and contaminants while adding a layer of protection for preservation. The product is formulated to create a polymeric film when wiped clean and neutralize acidic residue left behind from fingerprints. Extreme Duty CLP contains wear additives to combat friction during hard use. Aerosol cans are available. Price: $7.50, 4-oz.; $10, 11-oz. aerosol. Contact: Lucas Oil Products Inc.; (800) 342-2512; lucasoil.com.