Side high quality is everything: deburring, brushing

https://www.scribd.com/document/1041618560/Leader-Boxes-Developed-to-Last-The-Architect-s-Copper-Criterion-223754

Edge high quality is everything: deburring, brushing, and micro-grain sanding prepare surfaces so coverings bond uniformly and revealed seams check out as fine-tuned, continuous airplanes.