I saw a similar model to that at HD but it was an actual beverage center whereas yours is a wine cooler I take it. I believe HawkeyeJosh used 2 of them here on his build, I asked him about them and he said he was not impressed so far because they dont get cold enough to his liking and that is going to be my problem as I like my drinks "cold" 35-39 degrees! But I love the look of your unit and the matching beverage center they look smooth.
As for the copper, yep got the shield at $33 a can--WOW
But hey if it works then its worth it. I think maybe as for the wire brush a row with 2" and then a row with 3" then back to 2", what do you think? Or do you have another method or suggestion?