Count me as another alum convert. After a shave, a hot water rinse, a cold water splash, I then apply the alum block (no real need to wet the alum block if your face is still wet). I've found that alum works well before most aftershaves and Coral Skin Food (my typical finish). However, if you are applying a balm, alum may not be a good match. My experience is that alum will denature most balms. When I use my T&H Classic Balm, I do not use alum.

As to the suggested adverse health effects of the aluminum in alum: from my admittedly limited research, there is no scientific evidence to support this urban legend. I've covered this in more detail in past posts if you really want to go there...my suggestion is don't bother.

Cheers,
Ed