One thing to note is the surface due to the underlying copper material is extremely soft. So small knocks can absolutely cause small dings. In this regard the 1A aluminum is actually harder. The gold stays but can seem to slightly wear thinner on edges. It’s almost a microscopically small difference in gold surface and looks as if it changes color slightly, but not like there is material showing from underneath but maybe slightly? Also the phenomenon doesn’t actually get worse but maintains such a finish over time. It is so small it probably can’t even be photographed? In fact it’s maybe even subjective if it’s actually happening or not? But the outer edges can seem to show it ever so slightly, which makes me think it’s happening? Also it’s in areas which seem to get more friction like the edge above the volume control. But it’s so small that probably most don’t even notice it?