Copper, like all metallic surfaces,  will scratch, but polishing will remove most surface scratches.  Many times though, clients maintain their tops with surface scratches as it adds to the patina, or weathered look that they are trying to achieve.  The copper sheeting that we use is copper all the way through, so unlike anodized products, these tops can be polished hundreds of times.  Scratches will never rust and can be polished, or in extreme cases, sanded out.