How should I store and maintain a carbon steel Nichirin replica?
Updated Feb 2026
Carbon steel requires more attentive care than stainless replicas because it will develop surface oxidation if left untreated in humid conditions. Apply a thin coat of camellia oil or food-grade mineral oil to the blade surface every two to three months using a soft cloth, wiping along the length of the blade rather than across it. Store the replica in its scabbard in a horizontal position in a room with stable, low humidity - avoid basements or garages where moisture fluctuates seasonally. If displaying the blade outside its saya, rest it on padded display brackets and avoid direct sunlight, which can accelerate any surface discoloration over time. Wipe off fingerprints promptly after handling, as skin oils can leave marks on the steel finish.