It's ironic that my worst SR cut was on my pinkie finger. I hardly noticed at first, but it was a scalpel-like incision and bled a lot. I stopped the bleeding the old fashioned way, with tissue paper and pressure.

I suspect the styptic pencil might not be up to the task of clogging large bleeding wounds and would instead just up up stinging like a b*#ch. That's just a guess since I haven't given myself any major gashes that a styptic pencil couldn't handle.