Birchwood Casey Fastest and Easiest Presto Gun Blue Touch Up Pen for Nicks and Scratches Leaves a lustrous, lasting, protective film on all metal, wood and plastic surfaces. Doublenapped, 100% cotton flannel cloth Impregnated with pure silicone Packaged in a convenient reclosable poly bag, staying clean and moist after use. Use on firearms, sporting equipment and precision instruments to safely remove dust and corrosive fingerprints.