Birchwood Casey Perma-Blue 8 Piece Kit Including Liquid Bluing, Cleaner Degreaser, and Rust Remover. Includes All Application Tools. 684.7 out of 5 Stars. 68 reviews Save with Birchwood Casey Perma Blue Paste Gun Blue, 2 OZ, Gun Lubrication Add $8.99current price $8.99Birchwood Casey Perma ...