Edge high quality is whatever: deburring, cleaning
https://fernandoylov484.overblog.fr/2026/05/roofing-system-vents-actual-outcomes-copper-s-honest-aging-and-lasting-feature.html
Edge quality is everything: deburring, brushing, and micro-grain sanding prepare surface areas so finishings bond equally and subjected seams read as refined, continual airplanes.