It must have been about 20 years ago, when dragging out a deer, I lost my knife. It was a Mora with carbon blade and black & red rubber handle
A couple years later, my grandson was playing a paintball game with some of his friends from school. One of his friends found the knife, and my grandson knew just whose knife it was, after hearing me bemoan it's loss..
The rust cleaned off quite readily, and I still have that knife. Like below, except black sheath..