Hi Condor - You make a good point on the few minutes of rinse off maintenance if that's all that's needed. Unfortunately the knife will be getting totally immersed multiple times in an outing. Given that, if it's rusting during the hours out in the surf it may not be worth using.

Leatherman - Thank you for the response. This is the answer I expected to hear. The S30V knife I'm using has a blade coating that I'm not crazy about but it does prevent that. Unfortunately the edge is still exposed and suffers the problem you describe.