EASY TO USE, ALL-INCLUSIVE KITS ARE THE PROVEN WAY TO TOUCH UP OR COMPLETELY REBLUE MOST GUNS. EVERYTHING YOU NEED FOR A PROFESSIONAL-LOOKING, FIRST-CLASS JOB IS INCLUDED. CHOOSE FROM THE FAST-ACTING LIQUID GUN BLUE KIT AND THE DEEP, DENSE PASTE GUN BLUE KIT. NOTE: PERMA BLUE LIQUID GUN BLUE WILL NOT BLUE STAINLESS STEEL, ALUMINUM OR NON-FERROUS METALS.