Originally Posted by
riooso
I have a C-135 and I am puzzled about your staining issue. From my memory the Carbonsong has C-135 steel. I have absolutely no rusting, or corrision, problems because of the polish of the blade and the quality of the steel. If yours rusts after 10 seconds something is not right. You either have acid for water or........? I do see you live in a very high humidity location.
In general try putting Renaissance wax on the blade. The stuff is expensive and if cost prohibitive send me a PM and I will send you enough to get you going. After every shave I use an oil applicator with Camellia and Ballistol mixed together, but just a cloth would do, after every shave.
Later,
Richard