I carry a carbon steel knife daily (Izula, which is 1095), and the only thing I ever have done is wipe it off on my pants if it gets wet before I put it in the sheath. Every once in awhile, it might get slightly discolored on the edge, but never enough to make a difference. And a single pass on a stone or strop cleans it up. The etchings on the blade have had a patina to them since I can remember, and have never shown any rust.

I think some people get a little paranoid about carbon steel and have it in mind that it is going to rust and pit instantly and ruin the knife if they get it wet. On a powder coated knife, even if you left it in salt water, the edge is the only thing that's going to get attacked. Spend some time with a sharpening stone, and you'll never notice there was a problem.