I can tell you exactly how Sam finishes his belts. First, he gets his suede from Hide House in Napa California. It is 4-5 ounce chap split.
He then glues it to the belt with Barge cement overlapping the belt edges with the suede. When dry, he uses a exacto knife to trim the suede from the leather around the edges. After sewing, to get the bevel on both the leather and sued side of the belt, he uses a #5 Osborne edge beveler.
He slicks the edges with water only, then finishes his edges with a concoction of fiebings and angelus brown edge coating.
Well, there you go! Hope that helps.
I have spent wayyyyyy too many hours in Sams shop