when i get a new razor (or used) i usually let the blade soak in rubbing alcohol for 5 min to hopefully sterilize it. then wipe it off and give er a bit of maaz polish and finish it with renwax. i noticed during the first shave or two with it will instantly stain a darker color where the water or soap sits for even a second causing me to have to re polish the blade after the first use which i assume removes the wax. is this a reaction with the soap or water to the alcohol, polish or renwax? it doesn't seem to happen if i don't 'take care' of the blades in this way when i first get them. it looks more like an instant patina greying rather then a red rust and it polishes back off easily but it is aggrivating.