Well, after perusing the Alum pro/con threads for some time I ordered a block. I decided to use it exclusively as a post shave product for a while before venturing into the prep arena. Tonight was the first time and I am quite impressed. I prepped as usual, 2 pass shave with a pair of weepers, warm water rinse and then an all over the face rub with a wet alum block. A little tingling(nothing like styptic) and a few minutes to dry produced a very smooth, and powdery face(not visible powder, just the feeling). I then cold rinsed the mug and then applied my usual Classic Pitralon. Well, the face is tight but in a nice way and the feeling is smoother than I can recently remember. It was a good start and I look forward to incorporating this step into the routine if it continues to work in this fashion.