"Metal Finishing and Hot Caustic Bluing Course Four hours of exclusive instruction on this subject. Clearly explains and demonstrates in comprehensive detail everything that you need to know to professionally refinish firearms. Whether you want to add bluing to your services offered, want to refinish your own guns, or just want to possess this knowledge, in this course you will learn everything you need to know to achieve consistent success. In typical AGI step-by-step detailed fashion we explain, demonstrate and SHOW you everything you need to know. I can tell you as a Professional Gunsmith who has blued hundreds of guns that I have never before seen a presentation on this subject that was as clear, comprehensive and concise as this course. Covers detailed metal preparation; tank set up, mixing processes. Dozens of tips and techniques are revealed, many for the very first time. Instructed by Professional Gunsmith and AGI Director Gene Shuey. 4 Hours"