돈 주고 하지 마세요! 혼자 할 수 있습니다. 블루잉 작업 (GUN BLUEING)

I created a tutorial on surface treatment using Birchwood Gun Blue solution. I ordered it from the US headquarters and purchased it through a shipping company. A 3oz bottle cost $9.90. Individuals can purchase it through Amazon, as it clears customs without any issues. Because it is a toxic chemical, care must be taken when handling it. Ensure proper ventilation and avoid skin contact. The test subject was an Army Glock 17, the unengraved version.