To maintain battle-ready swords, regularly clean the blade with a soft cloth and apply a light coat of oil to prevent rust. Store swords in a dry place, avoiding leather sheaths for long-term storage, as they retain moisture. Sharpen blades using a whetstone or professional service, and check for loose fittings. Avoid contact with hard surfaces to prevent nicks. Always handle with care and wear gloves to avoid oil transfer. Proper maintenance ensures longevity, performance, and safety during handling or display.