Feel free to talk about knives on this thread.
52100 is a tool steel and very tough. I know one knife maker, PJ Tomes, who uses his pocket knife with 52100 steel to open cans without damaging the knife in demonstrations. This knife for sell is treated with Renaissance wax. Using a product like this ,or a drop of oil, or just wiping the blade after use will keep the blade shiny for its life - which will be longer than its owner.
I had a 52100 pocket knife that no special continuous care like above was done to the blade, except wiping it when it got wet, and it just turned a nice patina like my dads 35 year old pocket knife. Never showed any rust. Gave it to a friend,
At the same time I had a pocket knife with an ATS 34 top grade stainless blade rust.
Dave