Birchwood Casey Perma Blue Paste Gun Blue Kit

The Birchwood Casey Perma Blue Paste Gun Blue Kit is a professional-grade metal finishing system designed for restoring, touching up, or completing the bluing process on steel firearm components. This paste-based bluing compound delivers a deep, permanent black finish that bonds chemically to steel surfaces, providing corrosion resistance and aesthetic restoration in a single application.

Perma Blue paste formulation allows for precise application to specific areas—barrels, receivers, small parts, and detailed components—without masking or protecting surrounding surfaces. The compound works through a controlled oxidation process that darkens steel while creating a protective layer resistant to fingerprints and light surface corrosion. This makes it ideal for refinishing worn or bare metal, filling in spots where original bluing has worn through, or completing a full restoration on vintage or custom firearms. The paste consistency enables controlled coverage and allows users to work at their own pace without the time constraints of liquid bluing systems.

Gunsmiths, firearms enthusiasts, and restoration specialists rely on Perma Blue for touch-up work, metal prep finishing, and preservation tasks where appearance and corrosion prevention are priorities. The kit format includes the necessary compounds and application materials for complete on-gun or bench finishing, making it accessible for both professional shops and home workshops. Users value this product for its reliability in producing consistent black finishes that enhance both the aesthetics and longevity of steel components.