My first P7 was hardchromed when I got it, I believe by Tripps.
I had Robar redo my second one in NP3, which is especially nice on these guns, because NP3 does away with the need for any lube and you can wipe all grime off with just a paper towel. Its lubricating properties are awesome and it's impervious to any kind of sweat corrosion or tarnshing.
Unfortunately, unless you have it redone locally, you need to add about $75 to the price for round-trip shipping. I now live down the street from Robar, so they're very convenient for me.