Damascus and Carbon steel knives are better than stainless steel knives but they do require a little care. Here are some tips to help you care for your knife.
Given Damascus is a high carbon steel they need to be cared for and considered unlike the disposable stainless knives most have in their drawers. You will want to keep your knives stored in a dry space. Long term storage in leather sheaths could result in the blade rusting due to the absorbent nature of leather. We recommend preparing your knives for storage if you do not plan on using them for extended time periods. Coating the blade in Vaseline or a light oil (such as WD 40 or olive oil) will keep the moisture from staining the blade. If you are going to store them in leather we recommend you prep the blade, wrap it in plastic wrap then insert the knife in the sheath. The plastic wrap will act as a protective barrier between the steel and the leather. Once removed after storage simply clean off the blade and use.
If the blade does develop some rust or corrosion we recommend wet sanding the blade using WD40 with 1500 wet/dry sandpaper or 0000 or 000 steel wool. The WD40 acts as a cutting agent. This usually will restore the blade to its original state with little effort.