I generally feel copper is softer than brass or bronze in the hardened state or when all are annealed. And generally hardened or annealed bronze is harder than hardened or annealed copper and brass. But then again the alloys in the metals can change all this, and that could make all the...
Dulling Glaring Distracting Reflective Surfaces when Photographing
I discovered using a little dab of Sam's Transfer Wax along the surface does the trick
Hardness of Metals Chart
https://www.sccboe.org/cms/lib/AL50000450/Centricity/Domain/779/the-hardness-of-metals-a-visual-representation-of-the-mohs-scale.pdf
Yes, caterpillars are getting in on the act! Soon they will use their appetites, and natural aptitudes and skills towards the art of engraving, so all of us engravers will have formidable competition!