birchwood casey blue & rust remover birchwood casey birchwood casey blue & rust remover. a safe, reliable solution that removes rust and old blue easily and quickly without damaging base metal! safe for removing old finish from firearms, muzzleloaders and antiques. also excellent for removing rust from tools, gauges and precision instruments. blue and rust removal is a necessary step before reblueing or browning. 3 fl. ozs. order today! warning: this item cannot be shipped to canada. please check your state, county and city laws for restrictions before ordering this product. birchwood casey blue & rust remover