Hey Luc, I contacted a while back on your whole process and I decided to undertake a similar project (because I simply love the smell of Proraso). I took an old Labello lip balm tube and filled it with proraso shave cream, creating in effect a mini-shave stick. It has worked out pretty well. Because of the smaller size I was only wating about 3-4 days in between layers. It has turned out very well.