And if you get any trace of alum on the tang of the razor,or anywhere on the the blade,it wil turn the steel black in a heartbeat,be carefull
I can attest to this being true. I use a very small piece of cloth or chamois to aid the grip on my skin when needed. It won't necessarily "ruin" the blade but you will have one hell of a time polishing out the tarnish, if you are so inclined.