It's the fitting..
of the piston that is the hard part. When you get new chrome in the sleeve, it has to be honed to a perfect fit, and not too many people have what it takes to do this.
This was passed on to me by George Aldrich, who used to re-chrome engines. I have a buddy with a chrome shop, and asked the same question to George. Maybe he just wanted me to send my sleeves to him <G>
I never took it any farther than that since I sure don't have the tooling to do it...maybe someone will come along that knows how to hone cylinders.