i found a vintage horsehide Illinois strop at an antique store and am in the process of getting it in working order. the leather has no nicks in it only some surface scratches. i rubbed a little neatsfoot oil on it and have noticed when you look at it in the light there are uneven glossy areas running the length of it. is there some sanding or anything that should be done to the surface before use? when i run a blade over the surface i sound a little rough to me ( but i'm a noob so i wouldn't know what its supposed to sound like).