Heck, no! Get a real shaving brush from your grandfather? Then use it for shaving. It probably costs more than a hundred dollars today, is silver badger, and has decades more life in it. While you are at it, get his mug or bowl to use for lathering the shaving cream. Get a short handled double edge razor, some Merkur platinum coated blades, some pre- and post-shave lotion and you’ll love it shaving at least once a week.Get a shaving brush from your grandfather. Put some oil on the tip & you will be amazed. When done put it in a plastic zip loc until next time.
While I don’t use it, I have my great-grandfather’s shaving mug. He died around 1906.
Oh, used t-shirts cloths are the loving rub I give my guns after cleaning.