FYI,
There were a couple of older duty carry P220's refinished at my PD, including my own. The standard blue doesn't stand up to any type of regular carry very well.
If you do refinish a Sig, don't bother trying to get the factory to touch the gun afterwards. Their position is that refinishing outside of the factory will change the tolerances of the gun and cause malfunctions that they will not take responsibility for.
I found this to be true. One of these P220s ended up with a take down lever hole in the frame streched out of round. One would drop the magazine on each firing. I managed to screw mine up all on my own, at no specific fault of the finish, or gun.
With the arrival of the all stainless models, I would assume the the sensativity of the aluminum alloy frames will no longer be an issue.
On this topic, does anyone know what type of finish is being put on the black parts of the ST madels?