Everything exposed to the atmosphere is constantly being attacked by various agents of decomposition. This is no different where metals are concerned, and a Bowie knife, no matter how expensive the blade, can and will rust. Fortunately, this doesn’t mean you have to buy a new knife.
One obvious method is to use oil. Bowie knives with expensive blades should be oiled regularly, anyway. Not only does oil prevent rust, however, but it removes it. Clean off any excess dirt or flaked metal off of your Bowie. After this is done, apply a thick coat of oil to the blade. The next step requires patience. Let your knife sit for a minimum 72 hours. After it’s sat for a while, take a toothbrush or a sharp tool and, after wiping off the oil, use that tool to remove any remaining rust spots. Remember to lightly oil the blade before putting it back in the sheath.
Another option you can try is using an onion. Onions have acid in their juice, which can remove rust quite quickly. Choose an onion large enough to cover the blade of your Bowie knife, and then cut with a sawing motion through the entire onion. The juices should turn brown/red as the rust is removed. When you finish, clean the blade with warm water and then dry it thoroughly.
It will take time for any agent you apply to the blade to work on the rust. Plan on leaving a rusted Bowie knife sitting for at least a few days while the agent does its work. If you’re using citric acid or white vinegar, you’ll need to soak a cloth with it, wrap it around the blade and leave it to sit. Oil is used in the same way. After the blade has sat for a while, you can remove the cloth and work on the rust. Much of it will have dissolved with exposure to the solvent used. You can usually scrape away the remaining rust with a stiff toothbrush or a small metal tool, taking care not to hurt the blade.
These blades can last much longer than a lifetime if they’re cared for, and will generally last less than a year if they’re not. Knives are elegant tools and are often made of very expensive steel. This makes them durable, even when their blades have become rusted from improper care or disuse.
Blake is a business consultant for an online bowie knife store featuring the jim bowie knife.