Hi guys, I have two wool fedoras that have brims that are floppy. When I first got them they were stiff and the brims could snap own easily. Now, I tried to take them to a hat repair shop to get them stiffened, but the guy there told me that the stiffeners they use contain aerosol and that they would damage my fedora hats. He recommended that I could get some aerosol free hat stiffener, but I do not know what brand to use or what kind to look for. Any help would be appreciated. Thanks!