Side high quality is whatever: deburring, brushing

https://page-wiki.win/index.php/100_Years_of_Patina:_The_Engineer%27s_Situation_for_Hand-Fabricated_Copper_Cupolas_by_Salvo_Metal_Works

Edge quality is everything: deburring, cleaning, and micro-grain sanding prepare surface areas so layers bond evenly and exposed seams read as refined, continuous aircrafts.