I have removed a misaligned poorly repaired bridge from a 1260 Sovereign. The spruce under the bridge is cratered and gouged from the removal. It's a perfect surface for epoxy, but I'd like to glue on a 'new' bridge with hot hide glue. What is the best prep for the spruce? Can I fair it with epoxy and expect the hide glue to stick? or should I hide glue some graving pieces into the spruce to build up to a smooth finish?