If you carry any important survival tool or weapon, you need to maintain it. You should regularly inspect your knife, check the edge, and look for signs of wear or rust. I doubt that there is anything unusual about Doug's knife - 1095 is a good steel for knives. It takes a good edge, but will corrode if left in wet conditions.

You can protect your blade with an anti-rust coating, or paint it with some black-out paint. Dry it before putting it away. Also, de-burr the edges.

good luck,
Pete #2