How do you clean corrosion from the survival knife?

• A. Lemon juice and salt
• B. Fine sandpaper
• C. Abrasive pads
• D. Fine steel wool or fine wire brush

Answer: (D)

Corrosion on a survival knife is rust that you want to remove without hurting the blade or its edge. The best way is to use fine steel wool or a fine wire brush. This provides gentle, controlled abrasion that lifts the rust from the surface without removing metal or altering the edge geometry. After removing the corrosion, wipe the blade clean and apply a light coat of oil to prevent future rust, making sure the blade is dry first. If the knife is carbon steel, keeping it dry and oiled is especially important. Other methods risk damaging the blade or leaving residues: acids like lemon juice can introduce corrosion over time, and sanding or abrasive pads can be too aggressive and scratch or wear away protective finishes.