So... I think I have a recipe now. Thanks to you guys, some help from SWMBO and Google I'll try the following: 50ml alcohol 99% 25ml WH, distilled 5ml glycerin 0,5-1 tsp. menthol flakes (that amount is taken from my PSO, I think/hope it's safe to transfer directly?) My goal is a soothing, astringent that replaces my use in alum. I always apply either a balm or lotion after my alum, so that I'll continue to do here. On the days I use Old Spice or Aqua Velva, they of course replace this homemade solution. The Bay Rum is for another day. Link saved!