Powder layer versus anodizing was an eye-opener: powder uses rich structures and shade depth

https://blogfreely.net/buthirxehg/h1-b-the-reality-in-the-patina-why-personalized-finials-in-copper-are-the

Powder layer versus anodizing was an eye-opener: powder offers rich appearances and color depth, while plating exposes aluminum's metal clarity with extraordinary UV longevity.