So I've been reading old posts of styptic vs alum block for nicks and the consensus seems to be the styptic is better at closing up nicks quickly, while alum takes a bit longer. It seems a fair amount of shavers also use alum over the whole face as an aftershave.

So, is there any downside to turning a styptic pencil on its side and rolling it over the whole face after a shave? I tried this yesterday and it felt good, leaving a nice tingling over the whole face (little harsh in the trouble areas of course). You have to rinse it off after a few minutes or else it leaves a residue, but even alum blocks that don't leave a residue recommend rinsing them off after a few minutes.