Birchwood Casey Perma Blue Paste Gun Blue -
The longest-lasting finish, but slower to darken than the liquid blues. Easy-to-use PERMA BLUE Paste Gun Blue reacts slowly with the metal but builds up a denser finish that will outlast the liquid blues. Excellent for touch-up or complete reblueing. Metal must be clean and free of rust and sealed with Sheath® Rust Preventive to enhance and protect the finish. A dark blue color may require three or more applications of PERMA BLUE Paste, but each coat takes only 30 to 60 seconds to work. Apply with cotton swab. Complete instructions on each tube.
Perma Blue Paste reacts gradually with metal to create a deeper, denser finish than liquid blueing products. It takes longer to darken than other products each coat takes between 30 and 60 seconds but the results are undeniably superior. A dark blue color may require three or more applications. Ideal for touch-up work or complete reblueing. Apply with cotton swabs. Metal must be cleaned and rust-free before application, then sealed with a rust protectant. Complete instructions on tube. Weight 2 oz.