You might look into Metaloy, Industries - Professional Gun Finishing - hard chrome, blue and polymer finish
if you want Hard Chrome..
I was going to have him Hard chrome a Sig barrel for me.
But I decided I wanted to keep it black and sent it to Sig for a Nitron treatment.
Hard Chrome is hard to beat.
Tripps did my XD9sc, slide, controls and internals, but I've since sold it..
All my refinishing needs now go to CCR.. CCR Firearm Refinishing
He has a Nickel based CeraPlate that is awesome.
Brad at CCR has done 2 complete pistols for me, and I'm more than happy with them.
He does have a 4 to 6 week turnaround, but contact him because he now takes reservations.
You don't send him the pistol or parts until he is ready to do the work.
From his web site:
Cera-Plate is a true composite plating process. It is an Electroless Nickel composite process that incorporates Boron Nitride particles within the matrix of the phosphate bath. Its benefits include an exceptionally low coefficient of friction, excellent wear resistance. It is ideal for guns parts that require the lubricity of Nickel /Teflon but need more wear resistance.
Cera-Plate has a Rockwell hardness that rivals that of hard chrome but offers lubrication and more rust and corrosion resistance.
Cera-Plate is far from your standard nickel plating is true composite plating process that is made possible with the breakthrough in modern Nano technology. It is an Eco friendly process.
Cera-Plate not only looks great but performs great as well. It is a smooth finish not slippery like the Nickel/Teflon is.
This P239 SAS is done in Cerahide House Black with Ceraplate controls and barrel.
Good luck and let us know what you decide on..........