Side high quality is every little thing: deburring, brushing

https://www.scribd.com/document/1039664098/Copper-Doesn-t-Lie-The-Case-for-Customized-Smokeshaft-Shrouds-and-a-100-Year-Roof-Strategy-208840

Side quality is everything: deburring, cleaning, and micro-grain sanding prepare surface areas so coatings bond uniformly and revealed joints read as improved, continuous airplanes.