Although Urushi doesn't need maintenance due to its superb durability, following maintenance will make a difference in the long run.
◆It takes 6 months to reach near full hardeness, so avoid dropping, sudden shocks, etc.
◆Do not expose the urushi to direct sunlight for prolonged period of time.
This will cause the surface of urushi to deteriorate eventually.
◆If you want to repolish, rub the urushi with "swirl removing compound" + 100% clean cotton cloth.
Must wear Latex gloves, to prevent possible urushi allergy, even if unlikely to happen.
the compound must be finer than #3000 compound.
Make sure cotton is free of dirt, otherwise scratches can occur.
Do Not use #3000 compound, this will cause scratches that's visible under strong light.
◆You may use small amount of baby oil on urushi to bring out shine.
Also put small amount of baby oil to threads if you want to.
◆To bring out more shine and protect the surface a bit, use (automotive) carnauba wax.
apply the wax with your fingers, wait 10 minutes, gently wipe with clean cotton cloth.