I need a wider rim with an extra 1" off backspace for my Coupe, alas, the current Centerline Auto Drag rims I have are no longer in production so I've been searching for options.

OK, so eBag has a few listings of 8.5" wide rims with the offset/backspacing I am after, but none of these are the same polished aluminum finish that I have right now, instead these are the satin finish.

Therefore...how much elbow grease would it take to convert these satin rims to polished finish?

Is this even doable for a DIY guy with some basic equipment, or is this really the domain of wheel shops???

Thanks!