Acme Archtops builds laminated wood parts for archtop guitar builders. Our tops are laminated from solid spruce, in three layers of approximately .050in (1 1/4 mm) each. These robust layers give you leeway for voicing, and there’s a lot of material there for scratch and dent rehabilitation just before you apply finish. The show layer of the top is the face you see; we pick this for appearance. The bottom layer, that is, the bottom of the top plate, will almost inevitably contain small sap streaks and the like; these are not structural defects, but only cosmetic, and it would take a very special effort to see this surface inside the built guitar. All layers of spruce are vertical grain.