I asked this here before and was pointed to Weldcraft. They took 1 inch from the front of my 15x10 wheels to give me 15x9s with the same back space. These are polished aluminum. They were sanded smooth but I still have to polish them back out. I will still sand them smoother so they will buff better. I'm very happy with the job even though the price was a little high. If the cut can be made from the back it would cost less the there wouldn't be an issue with the finish.
I'm sure if chrome wheels have to be cut from the front, the wheel will have to be rechromed.