I have multiple blades that have sat for a year with nothing on them in a well ventilated bathroom with no adverse effects to the blade. I have also used a light coat of machine oil that I use for my pneumatic tools with out any issues as well but normally only use that if I am getting ready to store the razor in a case for a while.

Basically it is to protect the metal from oxidation so as long as the process you use works with no adverse reaction to you or the blade you should be good.