To care for a steel sword, keep it clean, dry, and oiled. Wipe the blade after use to remove fingerprints and moisture, then apply a light coat of mineral or gun oil to prevent rust. Store the sword in a dry place, preferably outside a leather sheath. Sharpen it regularly using a whetstone if it’s functional, and inspect for rust or damage. Handle with clean, dry hands or gloves to avoid corrosion from skin oils. Regular maintenance preserves both beauty and durability.